Looking to DM a new D&D campaign (campaign and plot will be decided based on chosen applications back stories)

I DM'ed 4 campaigns so far in the past. I am looking to get some more practice. It will be free to join. I am planning for a medium size campaign, once a week for several weeks most likely.

I allow homebrew but I will balance the game. If you can one shot end game bosses' level one, please expect to be one shotted as well. That being said, if you use an extremely weak homebrew (weaker than base game classes and races) i will balance the enemies in that direction as well. 

Most my bosses will be customized (yes, this means there is a chance for custom drops - custom does not mean op or even strong)

I will select 3 or 4 of the applications and create a campaign based on each backstory. 
Please submit character sheet, backstory and short memo of why you want to join a D&D campaign.

Applicants will be age restricted. 18+ only. Sorry, this is nonnegotiable. 
Please share your time availability, and your preferred platform to play on.