I am more than willing to step up to the plate and help, but all my efforts to date (as well countless others) have been like flogging a dead horse.
You at 14 are more than capable of rebuilding the engine Remington, but you have to listen and heed the advice of those that that are trying to assist.
There are countless snippets of information that your attention has been drawn to, have a read of the ones dedicated to engine building.
If after research you think that the job is too big for you ( with our help), I advise you to get a builder to do it.
If you follow the path of the builder, it does not stop there, it starts firstly with a leak test, it must be done immediately after installing a new engine.
Les us know of your decision so we can put this matter to rest!