I personally found learning (in SE London) quite mentally taxing, as the roads round here are quite busy other than the residential estates you’re initially taken to for the absolute basics. At first I wanted to do loads of double lessons multiple times per week, but that quickly become just a single lesson twice a week because otherwise I’d end up drained and making silly mistakes towards the end. As I got more proficient I took some doubles as my test was coming and I could handle longer drives, but I couldn’t imagine doing hours and hours at a time, especially early on.
First thing is just to get the driving theory/hazard awareness apps and rinse them, then go and take that test and pass it, which should be easy if you’ve done all the mock ones several times. Then find a good private instructor who does semi-intensive or where you can do multiple lessons per week, and who wants you to be a good driver who will pass the test easily, vs the approach of many a company/driving school where they’re happy to just get you to a level that’ll probably be enough not to fail as long as you don’t rack up too many minors, then you’re let loose on the road with no further instruction.
It’s also worth bearing in mind you have no idea how long it’ll take to get sufficiently capable behind the wheel; some people pick it up quicker than others, whether that’s the operation of the car (and you should learn manual because even if they’re being phased out gradually here, you might go abroad and hire one and not get another choice), road sense or the combination of the two - you might not need 48 hours total to pick it up, you might need more, but you can’t know until you do it.