Hey everyone first post on here!!! Excited for this year season !! I need some help i have a 12'x3' and 10 " high above ground garden . With last years season was pretty good im looking forward to this years crop :c) i need help here

In restoring my garden for this year what do i need some compost and lime and fertilizer? Now I'm pretty new but am a fast learner so how much compost do i want to mix in? Also first time using fertilizer for this season . Just not sure on how much to add I'm also probably going to buy the compost this year and make my own for the next .Thanks for your info