SI Joint

Hey all, first post here!

I've recently taken up yoga (couple months) to get a bit more flexible and I'm really enjoying it apart from somehow forgetting to breathe (for another day 🤣) but the problem is my right leg is 1.5 cm shorter than my right which I only found out last year. This has caused a lot of back problems over the years to the point of throwing it out so badly I couldn't walk for a couple days and in general my right leg is much tighter than the left and my Lower back always feels extremely tight even with stretching. I walk with an insole in my right shoe to make up the difference but I do yoga barefoot so I'm kinda scared I'm gonna be doing my garland pose (I can get heels to the floor and butt close to it but can't really straighten my back or I'll tumble backwards) and I'll just do myself a damage again 🙃 any People with SI joint problems here that have overcome them that can help a guy out? I'd really appreciate any tips! Thank you!