I'm 29 weeks pregnant with my first, due December.
I opted for an elective c section as I have tokophobia and like you, I like to know what's going to happen (within reason). It helps ease my anxiety massively.
Please ignore some ansty previous posters, I discussed my csection with my midwife at my very first appointment, at 7 weeks. My midwife actually applauded me for knowing what I wanted and thinking things through. So there is absolutely nothing wrong with enquiring and weighing up your options early on In pregnancy, pregnancy and the birth are a huge undertaking for a women, especially with your first, so I'd say it's completely normal to be thinking about it.
What I'd suggest, is doing LOTS of research, I read forums, read information on the nhs websites, followed pages on instagrams such as Csection UK and went into my decision to have a elective c section well informed about the risks, procedure, pros, cons and recovery. What I've learnt is that every birth has pain, vaginal has pain during, sometimes after depending on if you've needed medical intervention or had a complicated birth, elective c sections you will of course have pain after, you will have just had major abdominal surgery, but I feel it's more a controlled pain, your back at home, in your own surroundings, calm and able to process the pain hour to hour. I've learnt emergency C-sections are usually worse, because women have often laboured for hours on end and it's ended that way for the safety of mum and baby and is usually done in a rushed way and the recovery can be harder. But I've also spoke to many women who've had vaginal births and had horrendous tears and problems for years to come who've subsequently had a ELCS for their 2nd and found the recovery easier: sadly, no two births are the same so you'll hear very varied responses. So you really have to pick a birth plan that you feel best suits you, your needs and wishes.
But also go into it eyes open and know that not all plans go the way you intend, birth is unpredictable but there is no harm in having ideas of how you'd like it to go just don't be too set on them and be open minded to change.
Good luck!!