Was going to say the 50/50 mix is supposed to be by far the best penetrating fluid, just not the sort of chemicals in most people’s garages!
As others have said, there is a sense of achievement and education when doing your own car work, it’s never straight forward though, always a seized bolt, something in the way etc, so you have to enjoy it or you’ll get yourself in a pickle.
Opie oils are great too for sourcing the correct fluids at good prices, they also now sell filters and other key service parts..
AUTODOC are good too for most parts at great prices, you have to wait a week or so for delivery as parts are sourced through Europe.