I would recommend that you visit the charity shops and browse their
gardening sections. For very little money, you can collect the best
gardening books for the last (what? 20? 30?) years. You'll then get:

(1) Advice that you can revisit at leisure.
(2) Your own reference library.
(3) Illustrations galore.
(4) *Differing opinions* on the same subject, which makes for a better
balance of advice.

TV's OK, but it's first and foremost entertainment, not tuition. It
doesn't tick any of the 4 boxes above (watching Monty Don dig a trench
for his leeks [as if he did anyway!] is by no means the same as seeing a
set of annotated illustrations).

You'll learn far more from a book than from a TV programme, *and* you
can listen to music while you're reading a book.

2p