I have tried at least a dozen times and it always brings me to an island in doing it at the exact place a tutorial and that other runs have done it. I got it to go to portal room once but I didn't do anything different. Any help?

I am pretty skilled knowledge wise at speedrunning and have been doing it for a while and ive been practicing FSG, but each time i get a super good seed, one that could probably sub-10, I end up getting really bad times because I spend too long inventory managing and crafting. How can I improve at those?