Wow...this is a tough one. Hmm...back when I didn't have a license, I basically didn't do much of anything, except play some games.
If you want to "lift," well okay. But, are there other exercises you can do at the house? Is there a bar, shaft, or something where you can do pull-ups? Push-ups are possible almost anywhere.
Is anyone else willing to give you a ride to places? If so, I recommend making it up to them but not in money. Like, at the pictures perhaps offer to buy their ticket, or something like that.
I'm guessing you don't live in a really urban area (Chicago, NYC, etc.). Those are the only places where it's practical to get along without a car, and actually have decent public transit. Anywhere else, you need a car.
I should warn you though...it's basically stays hard until you turn 21. Then you can buy alcohol legally, and get into any bar or club (that I know of). Okay, so some of them don't require you to be 21 to get in, but it's pretty stupid to go there and then not drink at all (like, not even one or two drinks).
That's my experience anyway. I've never met so many people until I turned 21 and started going to bars and clubs. As long as you don't get wasted and start acting like a fool it's great.