The calculations needed for beginner poker are quiet simple:
If opponent bets half pot or close to half you have correct odds to make a call. This also counts for any raises.
Example... you have a flush draw... you bet 70 cents into 1$ for semi-bluff.. he min-raises you... you have correct odds.
This is because flush and straight draw are roughly 1/3 from flop to river. Turn to river are lower.
Implied are also not very hard. Implied odds are usually quiet big from one street to the next if your draw is not visible. Hence flush draw odds are very low if you c/c but they are higher if your aggressive in the draw.
Double gut shots implied odds are very high for example.
Implieds are usually 2/3 of pot size on the turn.. so they make a lot of calls profitable, unless your drawing for like a flush.
Hence it does not take long to learn.... the moment you start really trying to calculate the exact implied odds etc. your over thinking already. Estimates are enough.