What do I do with my savings?

m 21 years old with $20k in a RothIRA, college paid for, & $20k in savings account.

My savings are intended to buy a house in the future, but my account only gives back about $35/month in interest. Since I won’t be buying a house for at least the next 4-6 years, where should I put the money to make the most of it?? Please provide specifics. I’d like to get into investing, but know virtually nothing about it.

Also, does this seem like where the average 21 year old is sitting?? I’m worried I’m falling behind financially.