Most schools give 6 weeks. The normal way to prep for step1 is out the window for a current premed. Your boards will be pass/fail so much less pressure. Comlex will have a score, but no one cares.
what I did which worked well:
first semester: hold on for dear life. “Oh god what have I done? This isn’t possible! No human should have to do this!” Seriously I just did my best to survive.
second semester: started zanki (now Anking, maybe called something else next year.). Just did the relevant cards as my school got to a new system. And kept up with them afterwards.
end of third semester: Zanki has taken over most of my life and I really already have no hobbies or happiness in my life. Oh well, time to start uworld.
fourth semester: keep Zanki and uworld going and watch boards and beyond for an hour everyday. Your entire life comes down to step 1 soon.
dedicated: AAAAAAAAHHHHHHH!!!!!!
step 1: I’m too burnt out to care. Just make the pain stop.
wait on your score and convince yourself you failed for 6 weeks