Tbh I feel like you’re making this harder on yourself than it needs to be - the best way to start reading is to start reading rather than fussing about every single “what if” scenario which is how your questions sound like.
You don’t need to perfectly understand every single sentence there is (that’s to be expected), what’s most important is the general gist and for the concept that’s being talked about to sink in. If there are events mentioned or words you don’t understand, don’t be afraid to look them up to know what’s being talked about.
There’s also nothing stopping you from re-reading texts later on in case you grow forgetful or want to fully understand it with the added context from other works you’ve read. In fact, it’s common practice.
All in all, there isn’t really any kind of a secret sauce - just start reading and read and read and read, with the goal of reading to learn rather than reading to just get through it as you would with fiction.
Tbh I feel like you’re making this harder on yourself than it needs to be - the best way to start reading is to start reading rather than fussing about every single “what if” scenario which is how your questions sound like.
You don’t need to perfectly understand every single sentence there is (that’s to be expected), what’s most important is the general gist and for the concept that’s being talked about to sink in. If there are events mentioned or words you don’t understand, don’t be afraid to look them up to know what’s being talked about.
There’s also nothing stopping you from re-reading texts later on in case you grow forgetful or want to fully understand it with the added context from other works you’ve read. In fact, it’s common practice.
All in all, there isn’t really any kind of a secret sauce - just start reading and read and read and read, with the goal of reading to learn rather than reading to just get through it as you would with fiction.