Static load simulation - please help

Hello everyone!
I am new to working and designing in Solidworks, so I would like to ask experienced users for help.
For my own needs (space for firewood, tractor, and small items..) I constructed a metal structure that I intend to build with help of my son and my friends.
I tried to create a load simulation of the structure by following YouTube tutorials, but I'm really struggling.
The construction is still not fully completed because the pipes on the 'roof' that the metal covering will be attached to are missing.
Screenshot of the construction in the attachment
I would like to ask someone if they could "check" my creation through their program so that I know what is wrong and if any pipe needs to be replaced with a stronger (thicker-walled) one.
If you have any advice or recommendation - I look forward to it !
Thanks !