the five hindrances to jhana is a very simple practical lis…

one: you can be interested in something else

two: you can find the meditation unpleasant such that you don't feel like paying attention to it

three: you can be so exhausted that you don't notice much of anything

four: you can get bored & start looking around for something else to pay attention to

five: you can forget why you wanted to concentrate your attention anyway such that you're not motivated to do it

people talk about "jhana removes the hindrances" as if it were unapproachable magic--- it's a practical simple truth about what happens

jhana is very pleasant, so nothing else attracts your attention by being pleasant

jhana reduces pain, so your attention isn't knocked away by it being painful

jhana is easy & invigorating, though you do still need to be well-fed enough to produce the energy

jhana gives the mind a place to rest, so you don't feel bored & like you need to look around for a resting place

jhana is unmistakable, so when you're directly experiencing it there's no way to doubt it