clutch kit/low gear

ok guys I’m hoping for a bunch of different inputs on this one.
first off at my house we have a lot of bumpy trails and tight turns so I’m not flying around in the trials.. with that being said i know people have told me to stay in low when riding like that. but how fast should you be in low? and is the really high RPM’s a problem? I’m not used to riding in low so it kind of makes me worried with the high RPM’s
also what will a new clutch do for me? suggestions please

thanks again like always guys