Your kitten is a normal kitten, doing normal things. Your issues are common ones that a lot of people go thru, so no worries there.
1. Meowing. Some cats just like to talk, and sounds like you have a talker.
2. Biting feet. This is common behavior for many kittens, and there are constant new posts on this issue. If people don't train them not to do that, they experience major pain when they grow up. Luckily, he's only 6 mths old, so you can train him easier.
Your feet and/or hands are excellent cat toys. Make sure you have a toy handy to distract him as he's moving for your feet. When he latches on, do not move, be very still, and let out a high-pitched scream directed at him. The first few times his ears will go back, and he may stop but not let go. If you try shaking him off, he'll think you're playing, and it'll encourage him. More short screams and he should finally understand that he's hurting you.
It may take several months of consistent
training. Lots of patience needed. Or you may get lucky.
He may never outgrow the behavior completely. Sometimes my Pixie can't help herself, and she will launch at hubby's feet, but never mine. She only understood that she hurt MY feet, but didn't associate it with ALL feet. Hubby never screamed (too girly), but if he's very still, and says OUCH, her ears go back, and she'll stop.
3. Needs playtime. He does sound bored, and needs interactive play with YOU. He can have all the toys you want, but if they're not interesting to him, they're useless. He'll enjoy chasing things you drag along the floor, or fly above him. Da Bird is excellent.
4. Biting after too much petting: already lots of other good replies.