I highly recommend the tutorials in Mortal Kombat 11 and Mortal Kombat 1 (the time travelling reboot/sequel to 11). They do a really good job of teaching intermediate/advanced mechanics in a way that are pretty straightforward and understandble. I never understood whate "frame traps" or "plus/minus on block" meant until I did the tutorials for MK11 and I've been (casually) playing fighting games since Street Fighter 2.
The World Tour mode in Street Fighter 6 also starts you off by easing you into the mechanics, giving you mini missions where you get to practice specific mechanics "safely". The dynamic controls which massively simplify inputs is also a godsend for people who are intimidated by quarter circle inputs and the like.
The World Tour mode in Street Fighter 6 also starts you off by easing you into the mechanics, giving you mini missions where you get to practice specific mechanics "safely". The dynamic controls which massively simplify inputs is also a godsend for people who are intimidated by quarter circle inputs and the like.