you can invest pretty much anything into a roth ira but you need to meet the qualifications
Roth IRA Eligibility Requirements: See If You Qualify | RothIRA.com
make sure you understand that and also your maximum contribution is $5,500 ( i think it's $6,000 for 2016 tax) anything above that and you will need to reclassify the contribution or face a future audit/fine.
but it's really a self-service account, you can invest stocks, mutual funds etf, bonds, etc etc in it. If you want to set it and forget it, i'd pick a mutual fund you're comfortable with and set your DRIPS on thats it. There's alot of strategy retirement mutual funds that basically do all the allocations for you (aggressive when young and less agressive as you age).