Learning gets harder as you get older, and driving is one of the more difficult things to learn, especially in a city, and even worse in London.
You could try learning in an automatic, which means one thing less to worry about, but that restricts you to ONLY driving automatics in the future.
I really wonder if learning to drive is a good investment for you. There are many other things you could do: learn to dance; try volunteering somewhere. The possibilities are endless.
As you say, driving in London is so expensive and public transport so good that many young residents choose not to learn.: This from 2018 so pre-COVID:
The proportion of those aged 17-20 holding a driving licence has fallen by almost 40 per cent in recent years, dropping from 48 per cent in the early 1990s to 29 per cent in 2014. Licence rates for those aged between 20 and 29 dropped from 75 to 63 per cent over the same period.
Car usage is also significantly down, with those aged between 17 and 29 taking 36 per cent fewer trips in cars in 2010-2014 compared to the late 1990s.
Those decreases can be partly attributed to changing lifestyles among young people, with those aged 17-29 spending an average of 60 minutes extra at home each day in 2014 compared to 1995.
Young people are also said to be increasingly living in urbanised areas, meaning they have less use for cars due to better access to public transport; the researchers noted there had only been a “small increase in trips per person by public transport”, however.
More likely causes for the reduction in car use among young people include “long-term change in the nature of employment” together with “increasing use of ICTs” - information communication technologies, or smartphones and computers. The driving test increasing in difficulty, the cost of driving growing, and young people living with their parents for longer than they used to were also cited as possible reasons.