Some Questions I Have

Hello! I have been in the crypto scene for about a year now, but have been trying to dive deeper these past couple weeks. Here are some questions I have that I've tried to find online but everything I find doesn't give a clear answer. So I'm just going to make a list of questions I have.

1. What's the difference between converting tokens and bridging tokens?
2. What's the best crypto exchange when it comes to low fees and security? I'm currently using Coinbase Advanced and just want to make sure there's not a different exchange I should be using.
3. How do you get into air drops?
4. How can I find air drops?
5. Is it smart to get into IDOs, and if so, how do you get into them?
6. I see that some people have a bunch of different wallets instead of just one and was wondering if it matters whether or not you have multiple wallets for different purposes or if you just have one wallet for everything.
7. What do you do to stay on top of crypto news? Are there any twitter accounts and/or youtube channels you follow to get your news?