Hi Lionel
Ask these guys the moderator is a welding teacher
https://metalworkforums.com/f160
I have been a hobby welder for years, I did a TAFE welding course and it opened up some doors , seeing the industrial 3 phase welders they had at TAFE , it was like night and day the difference in what you can do.
At home with a single phase welder you will be limited to a large degree to relatively light gauge materials. But I did manage to build the body for my C8 Chev with a basic MIG and Arc welder , the max gauge I welded was around 5/16" or 3/8" mild steel.
One thing I learnt where I live is: the mains supply voltage is critical, it can go up/down depending on the time of day ... after 4pm welding is not possible.
Use 15 Amp rated leads and keep your power leads as short as possible, longer leads means more voltage drop ... with single phase you want to limit the voltage drop from the mains supply, voltage drop really is bad for electric welding.
The Lincoln you have is a great machine so you have a good starting point.
I have a WW2 era US HOBART welder: supplied as Lend-Lease, it is 300 Amp DC and is driven by a Dodge 6 engine.... it is sitting on a Aust. single axle traiiler with the 18" Aust. wheels, it has a Allied Works Council number on the chassis. It needs fixing, the commutator looks worn but it is a complete unit, nothing missing. A jeep would tow it short distances. A club member here was using it on the farm , but he retired and downsized, it was too good a deal to refuse.