I may be off base in some of my statements but understand the intent is meant well.
First, orgasm and ejaculation are two separate functions. Men see them as the same because they normally happen simultaneously. Once you can mentally separate them the whole world of enjoyment opens up to you.
Try to learn to disconnect from the thought that an erection is needed for enjoyment/pleasure. Personally if i get one I know I am working too fast.
For men, I need sex is written in huge letters on a billboard, for women it is written in a quiet novel on the night stand. My wife would say, get me started and then I will remember why I like this. I plan for orgasms every night just to keep things working

I don't always feel like it but after a bit of time just decompressing and putting on lotion full body etc and clearing my mind I remember that hey, a bit of wiggling in the sheets would be good. I used to frustrate me when I would go to bed raring to go and my wife needed to to relax and get ready/in the right mood. Now I totally understand. Kind of like sneaking up on sex rather than clubbing it and dragging it away.
Wipe you sex slate clean and relearn your body. It is rewiring itself with entirely new erogenous zones or areas that felt good before, now are amazing. Operating it with an outdated owners manual leads to frustration. Enjoy the process of discovery.
Part of my process was discovering female type orgasms before I acknowledged being trans. I would enjoy multiple O's then decide I needed a traditional male ejaculation because it does feel different. After awhile even the viagara wouldn't do anything and I decided I needed to make a choice and I went with female all the way. I stopped interacting with my penis in a traditional male way and haven't missed it a bit.
Because the glans becomes the clitoris in SRS I have begun occasional stimulating it as a clit and learning to have organs that way. It is a different feeling but still quite powerful and takes more practice than I imagined