I use fido (fidelity) and like it and recommend it without hesitation, others like vanguard. Both are excellent IMO so pick. At your age I'd be heavily equity invested, I was 100% at your age other may suggest 75%, in an index of S&P or total market. The key is low expense ratio in fido I like IVV or IVE funds. Honestly the key is to start, at your age again Roth has nice effect since you are probably in lower bracket than you will be in the future so don't give up much in tax savings of traditional and get that tax free compounding.if you and wife contribute to max the growth can be great, look at this year. If market ever goes down don't pull out, many make this mistake, keep adding and wait for recovery. Unlike individual stocks the market index can be counted on to come back, stay the course.