>>57842it's prettu easy, actually, especially with rcs but is very possible without it, approach the other craft on orbit (within 300m), then turn on SAS on both crafts and make them target each other (this only works if you have the docking hatch on the front of your craft, if you don't right click the hatch and set it as the control point or something), then turn on your engine for a bit and approach at 2m/s or something like that
I've never landed on duna btw