Some of my comments may sound a little harsh. They aren't really. I just want you to really look at what you want in a woman and think about how to attract (with as little effort as possible) that sort of woman.
Your pictures are good in my opinion. You are a big guy with decent style and a masculine look. You have good hair, good lips, good bone structure and a good strong jawline. You do look about 10-15 lbs. lighter in your motorcycle picture from last summer than you do now. Keep in mind your HB score is going to drop a half a point to a point for every extra ten pounds you carry. The same is true for women, trust me. I slay absolutely at about 115, but it's hell to try and stay at that weight. So I am at 120-125 and call it good. I can't run the 40 miles a week it takes to stay at 115 anymore. Knees won't tolerate it. Is what it is. Cut out carbs and beer for a bit (go to vodka/soda - no carbs or whiskey neat or scotch on the rocks - very low carbs) and see if you can get that extra off your middle. Women notice it. Staying fit does not get easier. Bummer but its fact. Accept it and adapt accordingly.
So my other questions are from a slightly different angle. First what is your target age? Second, your motorcycle pic sort of puts out this "bad boy" image upfront...is your follow up congruent with that? Or are you suddenly Mr. Polite? If you are then your behavior is not matching the image you portray, and that can trip you up.
It is my belief that the better looking you are the more you'll fare better IRL than online if you have the time to commit to RL interactions. In RL you can also control the sort of women you sort for by what venues you frequent. OLD is too much much of a catch all for everyone and anyone...but some of the men here swear by it with the right pictures. OLD is all about pictures.
The background in your first pic looks like a roadhouse dive bar kind of place. Do you want a roadhouse dive bar type woman?
If not, then you need to choose somewhere else to frequent or at least put a picture from a classier place in your profile. In my area for example there is everything from dive bar to high end swanky places that are booked with reservations every night of the week for dinner...that also have a good high end bar scene etc. The single women who go to the high end places have means and can afford it. Higher end venues are a pre-screening device that keep the riff raff (who can't afford it) out.
What kind of woman do you want to meet? Go where those kinds of women go. It allows you to focus on your target market. Don't go to collegiate hang outs if you think 21 year olds are too young (for example). If you prefer 21 year olds, then by all means go to the college bars and hang outs.
Figure out the hip hotel lounges in your area (I am partial to the "W" Hotel Properties myself as my type peeps hang there most typically)...but these are the sorts of things to ask yourself. Is motorcycle culture something you want a woman to embrace? I for example generally avoid motorcycle dudes. I don't want my hair messed up or have to wear pants, and I don't like the risk associated with bikes. I find it too "try hard" in some ways but if its something you really enjoy then obviously you'd like someone to enjoy that with. Go to rallies and events the motorcycle dealership puts on in that case.
As far as sexual interest goes...if you are asking the question then you do not naturally know what to do and when. That's OK. Find some venues and go watch people. Watch the men. You'll see some men who are very smooth in how they interact with women. Observe what they DO (what they say is less important than what they do.) Sit far enough away so you can't really hear so all you have to go on is body language. It will tell you everything if you pay close attention.
There are many good posts about escalation and kino in the DJ Bible. Women do respond to it, but again, only when its congruent with your overall presentation.
The best way to learn is by doing what you did with the hottie last week. Approach 100 women like
@narcissist has embarked on recently. He blasted his reservations about approaching by doing that and evolved his comfort level with hot women at light speed. Do it and see how the action influences your outcomes (positively!) No one here can tell you what your approach style should be. Some men are dead pan blunt/direct, some are charming, some are sh*tty/funny, some are mysterious and quiet, some are gregarious outrageous touchy feely flirts. Any of those styles can work just fine so long as it has integrity with who you are at your core.
What you don't want to do is contort yourself and your personality into someone you are not in an effort to meet chicks. Women see this a mile away and it is a turn off.