Yeah, finish the other PAT subsections if you're more comfortable with them. The last thing you want to do is spend too much time on TFE and not have enough time for the stuff you're good with. Try not to fret TOO much because the PAT section is the most forgiving section in terms of getting questions wrong- you can miss more and still make a good score.
I wouldn't skip all of it till the end, what I did was just went through and answered the ones I knew right away and marked the ones I wasn't sure on to come back to at the end. That way you aren't wasting a ton of time on one question
The best thing you can do is buy the DAT Achiever and practice the TFE on there. It is incredibly difficult (more difficult than the actual thing I'd say) but the PAT for those practice exams really prepare you well