How to model this frame by welding in solidworks? Please help!!!

Hello friends of the community, I come to ask if anyone can help me modeling this part in solidworks, it is a frame for a corn sheller machine. I do not handle the welding process very well or how to join each sheet or profile as seen in the photos. Attached at the end how the final model of the frame should look.

I appreciate your support and/or the information or tutorials that you can provide me.
Cordial greetings.