My wife and I have 4 Roth IRAs combined. We have worked for the last 15 years to know many of the ins and outs. Not an expert, but studied it quite a bit. You do not have to touch your Roth when your are 59 1/2...You can (meeting all the requirements), but you DO NOT HAVE TO!! You do not have to start taking distributions after 70 either...IRAs yes...ROTH IRAs, no. The taxes have been paid.
Years that we made small income, we would transfer money from our IRAs to our ROTH IRAs...Pay the taxes those years. Way back when I had a keogh plan. When I was done farming I transferred it to my IRA. Keoghs are not used much anymore...Too much paperwork. We would also start with 401Ks working different places...When we were done working, we would transfer to IRAs, then to ROTH IRAs over the years. ROTHs can pass through your estate tax free. Your beneficiaries do not have to touch the money for ten years after the estate closes!! It also can grow tax free during those ten years!!! The ROTH IRA for the most part, can not be touched in bankruptcy. If you have a business or could get sued, keep the ROTH till last.
Schwab and Fidelity are really the best for IRAs and ROTH IRAs. It is their sweet spot. Disclaimer..I do own stock in Schwab.
The ROTH IRA, like the 401K, are the best things going for small investors/workers. Use it to the max.