https://cycle-ergo.com/Changing ergonomics succesfully is harder than it seems.
Maybe Tall Boys are good for you. Maybe not. You'll find out
Sato Racing (made for the 'shorter' asian market) usually make rearsets that are actually forwardsets. Probably discontinued for M900. There are several manufacturers of 360 degree rotating peg adapters.
It's important to establish which joints which will actually benefit from opening or closing. Lowering pegs open both hips and knees. Rearsets opens hips, but sharpens ankles and puts a different kind of load on the knees.
It will be easier to understand when you go a few rounds on the software.