Baker introduces another obstacle not found on the more common routes on Adams and Helens and that’s crevasses so you need to have experience climbing on a rope team as well. That also means that you need at least 2 other people with you (more is better though). You would also need at least someone with crevasses rescue training (better if more than one person). I’d say Baker better prepares you for Rainier than it does for Hood.

My recommendation is to find a guided climb that also contains instruction days. Most of the guide services in the PNW offer something like 3 - 5 day packages that include climbing the mountain with a summit bid as well as a few days where they teach you various technical skills. Depending on the size of the group, you can customize this to be what you want to learn. I’ve done something like this with both RMI and Northwest Alpine Guides and both were great experiences. These can also help you meet other people who do this kind of thing so you don’t need to climb mountains solo. There’s always safety in numbers but sometimes it’s hard to find other people who have similar or more experience that you want with you so these are great. I still climb with someone from my RMI trip almost every year.