If I can ask, where did you get that training? I would also agree with your recommendation.
The problem with the modern martial arts is that they have been watered down form their original combat roots. In the "do" styles this is for sport mostly. The "jutsu" styles are more closely aligned with their original roots.
Brazilian style is in my opinion about as close as you get to the truest sense of jiu jutsu (not judo).
Same applies for aikido and aikijutsu. Both similar, but the jutsu variation can be really interesting to learn.
No matter what you learn to do, learn how to stretch properly!
Most of my training was in Hammond but then my sensei moved to another state so that dojo closed. I continued briefly in Joliet but had to stop about six years ago due to finances. Unfortunately being laid off has only made that worse and I would l need to get some workout injuries corrected before training again. I can't really do the rolls and break falls very well with my lower back problems.
Yes stretching and warming up are important! I would recommend also studying body mechanics and proper alignment. A large majority of people have their hips tilted down in the front creating excessive curvature in the lower back leading to back pain and injury. Balance in strength and flexibility between the muscle groups is important.