You have plenty of time. In most cases, you don't even really go over the details of home birth until your 36 week appt (when they usually come to your house if they haven't been already). I would just start doing some reading and connecting with other mums who've had home births in the meantime until you see your midwife again just to get your head around it and figure out how to prepare.
I had a home birth with my first 5 years ago and am 38 weeks with #2 now and waiting for another home birth any day now. It was really lovely. My birth was so relaxed and straightforward and I felt so comfortable being in my own home. I was so comfortable in fact that the midwives showed up and then nearly left again because they didn't believe I was really in labour yet - turns out I was fully dilated and my daughter was born shortly after that. I did have to go to hospital that first month with my dd (totally unrelated to birth, she lost a lot of weight due to a poor latch, but was put on the maternity ward and it was so stressful and noisy, I can't imagine being able to relax enough there to give birth!). But I'm much like you that I feel very comfortable in my own home, I have everything here I needed, and it was really nice to just be able to crawl in bed with dinner after as a family and my dh didn't have to go anywhere, there weren't midwives barging in on us, etc. We also live fairly rurally, so it's really quite and peaceful out here.
I would have a look and see what home birth resources are available in your area. Some areas have dedicated home birth teams as well as home birth support groups (where we live does). There's also a few useful websites with information (Home Birth UK, etc.) and there is a Facebook group called Home Birth Chat UK, which you might find helpful too.
Happy to answer any questions you might have. My birth was really lovely and positive though, and I genuinely believe that because I was at home I probably avoided some unnecessary intervention (I had a back to back baby, which meant labour slowed up at one point while I was pushing so she could turn. In hospital I definitely would have gone longer than they would have 'allowed.' But in reality, all was fine. Midwives monitored me and baby and I were doing great and they just let me get on with it, and I had a wonderful, easy, natural birth because of that. I don't think I would have been as lucky in hospital.). Very much looking forward to my 2nd home birth any day now.