Where do I begins?
Since you are a new member, investing in Bitcoin can be a good start for you. Because Bitcoin investment can be reliable for you. So with a limited amount of money you can start investing in Bitcoin.
What's the best wallet you're using?
You can use hardware wallets. Using a hardware wallet will keep your money safe. But I think if you don't have the convenience of using hardware wallet you can use Electrum wallet. Because I find this wallet more secure than other wallets.