The first time I ever had sex it was apalling. I did really like the guy and had a long term crush on him throughout my teen years but he was godawful at sex. Not a sex god.
For foreplay he seemed to think just vigorously smashing his fingers in and out of my junk was sufficient, and didn't pay any attention to my tdick (what was at the time a clit before I transitioned).
By the time we were having sex he basically had to force himself in, and in some positions it just wouldn't work at all. I remember disctinctly that I didn't cum, and that it was pretty painful and I completely lost interest in sex for years after that.
I actually struggle a lot during sex these days because due to the effect of testosterone, part of my junk is larger than it used to be (so I have somewhat of a dick now) and in several specific positions for sex the actual physical contact between me and the other person, with the friction, can cause me to cum waaaaay too fast and since starting testosterone I am fully male these days and I'm one and done, there is no second wave here.
So these days I have to be pretty firm about not prefering certain positions and that also comes with experience. You may find the more frequently you have sex, the sooner you figure out which positions do and do not work for you.
For example I can't be on the bottom, unless it's the end of the hook up and they're really to finish.
I have to be either on top, or other positions that reduce friction. Otherwise I cum and then I have to actually just lie there while they keep going until they finish up, which for some guys can take ages.
I also switch between anal and normal sex depending on what mood I'm in.
When I have sex with cisgender women, in those situations I actually*prefer* to be on the bottom as if they are sitting on me. The friction in those scenarios is good, and in fact the only way I can tolerate sex as I don't particularly want them to stick fingers up anywhere.
I've had some really good sex over the years, including with other trans people (usually the best experiences) or gender non conforming partners. I'd rank gay men who were first timers as next, because it is a great experience introducing someone to having sex in a way they hadn't previously considered due to their sexuality and each gay guy I've been the first trans guy for they have noticeably enjoyed the experience immensely, and I do get happy about that because it means they will now consider other trans partners. I'm lucky, because being fairly attractive on a conventional level it can swing gay men towards experimenting with me, but I've never had one of them say they regretted it. After that I'd say gay men with prior experience with trans men, then bisexual men, then cisgender women. In that order.
Fortunately I'm lucky because I have Grindr, the hook up app to dominate all hook up apps. Sometimes it takes me less than 5 minutes to organise meeting up with someone. I do meet people numerous times if the sex is good and we get along well, but generally I enjoy the anonymity.
The ease of organising hook ups using grindr has meant that even being asexual I always have someone basically immediately available for my needs, so I'll basically go 3-4 months not opening the app before I just trawl it for some dick until I get a hook up.
Sex is weird and messy. People have their specific preferences. I've hooked up with a guy and had it fail spectacularly because I was far too autistic for him to understand and I threw him off because I was silent and made too much eye contact and he could not tell whether I was enjoying it or not, which turned him off. We both said that it was the most uncomfortable sex we had ever had.
So like, when you click with someone it tends to work out better. And you don't have to be long term partners or anything, just being on friendly terms is really good enough.
But also, open communication is the most important aspect. Being clear with your partner and telling them to be clear with you about what you both like and dislike. Explaining this to eachother. Discussing kinks. Just actually talking about what you want the sex to be like. If there wasn't enough foreplay, tell them that.