For Bitcoin (BTC)
You could try checking this thread created by the former forum member Lauda in the Beginners and Help section. I'd also advise you to check that board because there's many useful information for newbies there. From that list, any wallet will do, but the easiest to use is usually Electrum

For Ethereum or ERC20 tokens; MEW will do, you can check the above post from BitMaxz to see a guide on how to set it up.

Altough you said you didn't want to buy a hardware wallet, I'd suggest you do. They are not really expensive; and the security they provide is worth every penny.
Also, as a personal tip, I'd advise you to steer clear of any DeFi, ICO, IEO, whatever name the new HYPE scam trend has; because you will either loose time, money, or both