I follow a bunch of on online tennis coaches and I’m really glad I do. I have learnt a ton. Much from their free stuff and tons from the courses I’ve bought.
Florian Meier (not the touring pro :-)) focuses a lot on technique and is currently sharing some free instruction on dominating the net. So I thought I would share in case you haven’t heard about it.
His first video is about how to avoid framing volleys. Check it out. I hope online instruction helps you like it has me.