Hello ScampiBunny, and welcome to BinkyBunny! Congrats on the decision to become a bunny mom, and I hope your experience with bunnies is a good one!
Hedi was right to warn you that we are a very chatty group, and a lot of the members here are very nice and knowledgeable. We’ll likely answer any questions you might have in no time!
Anyways, I’ll offer you what words of advice I can, though I am fairly new to informed bunny raising myself and can only really speak from my own experiences:
For one, I wouldn’t be terribly concerned about his exercise habits so long as you are patient and give him plenty of opportunities to explore. I rescued my bun from a neglect case and, although she was withdrawn for the first little while, she soon came out and is now more active than ever! So long as he is properly nourished and in good physical shape, he should likely come around more when he is more familiar with his area.
I see you’ve got him quite a number of toys and have discovered the joys of NIC cubes — well done! It looks like he is well-set up and very happy. If you really feel he is not getting enough exercise, what I do to cheat and interest my bunny in some of her toys is either (if possible) load them with treats like raisins, or lightly submerge them in apple juice. As Hedi said, most buns love apple juice, though take caution to only use the natural, unsweetened kind. Mine is also a big fan of a cardboard box I set up for her filled with shredded paper and cardboard scraps, which I can also coax her to show more interest in by tossing in a raisin or two
Also since I was a witness of this myself, I would also like to mention that my bun had a problem with dirty feet for a little while when I first got her (all her owner used for bedding was newspaper, so her feet were very near black when I got her.). I gave her a couple weeks to get used to me, then I gave her a small bath to try to clean her up a bit. If you really feel a clean-up is necessary, use a little bit of mild, soft soap (I used oatmeal-based shampoo for small animals and miniature breeds of dogs) in a small amount of lukewarm water – being immersed in water typically freaks bunnies out , so don’t use very much – and try to rub his feet clean. (This is a rough job for one person, so it helps if you can have a friend help with holding your bun down and offering them comforting words.)
Anyways, I hope those tips help at least somewhat. Best of luck to you, and keep us posted on how he’s coming along!