I am not going to recommend anything since everything we come up with is new and unknown to you, and more importantly, it will be a gamble for you. That's not how you should invest your money.
There is no way to gain 3-5% per month without exposing yourself to unnecessary risks. Take some distance from your capital and only invest your time in getting to know how everything works, and what viable options are.
It's pointless to force yourself to invest when you don't even know what to do. People having done so anyway are all regretting it since there is no fun or whatever in losing money you worked hard for.