i rushed algebra 2 and now im terrified of precalc

so basically i took an online course for algebra 2 over the summer, but the thing is i most definitely did not learn enough, like my skills especially in logarithms, factoring and trig functions are absolute trash. I basically just did the khan course for it and now i am terrified that I will be really behind for precalc help what do i do!? resources and just like the most important algebra 2 topics for precalc would be helpful!!