u/criticalencore

I've finally been having luck growing a d have enjoyed the new hobby. I plan to make my own agar soon but I had bought some online to check it out. is there a good site that has a some solid step by step for people new to agar instead of youtube and searching this and other subreddits and like shroomery and stuff? I had transfered some tiasue from a mushroom i had grown to a couple of these plates about a month ago just to see it. I was trying to figure out where I would cut out of to move to a new plate but I figure these are probably junk since they looked like contam? the videos I have watched looked like they weren't as much off colored and more white. Just kinda trying to figure out where to get some more info. thanks