I used to do the left foot on pedal, hop, hop, swing your leg over thing. Forget what they call that style mount. Now, at 67, worried about my coordination to do that as well as my ability to get my balance quickly enough. Plus, now I'd have to allow for the fact I've gone from a fairly lightweight Trek to a 65lb+ e-bike.
Anyway, I now pull the bike over toward me to about 45 degrees, grab the rear brake to steady the bike, swing my leg over and arrange the right pedal to the bottom of it's travel. From there I transfer my weight to that right foot as I straighten the bike to upright, and punch the throttle to get the bike moving. This has proven to be a fairly reliable method that just plain works for me. No more worry.
Dismounting similar. Right foot on pedal, slide forward off the seat as you stop and transfer your weight to your left foot on the ground. Pull the bike over to 45 degrees and swing your right leg over the back to clear the bike.