Welcome [back] gasric! Learning and 'puzzles' [&thus test questions = cert] fascinates me: FUN!
A 1st question/concept comes to mind: specific GOALs: What [more precisely] are you/I wanting to accomplish?
Getting a ['better'] job? Or just 'because it's there' (personal achievement/'fun')?
p.s. Crazy idea: buy LQcert.xyz $1 domain, and create -free- certS,
self-graded, concept-based:
like: 11)AWS 11.1)Containers 11.1.1)Docker 11.1.1.1)Deploy .iso ....1) its VPN config ......
In -my- ..., it wouldn't have laborious/rote questions, but instead: just 'THE' web-search keywords!
One would simply check-box an item, when they have both: done it, and 'feel' mastery of it
(my concept is like how interviews ask specific '{have,how would} you [done/do this ...]'?)
Of course it 'guarantees' NOthing, but 'certs' don't guarantee anything (as often discussed)!
Anyway, Best Wishes... ENJOY! (There's many prior LQ
threads on cert...)