Ran low on coolant, now starts rough/rough idle that mostly clears

[1.0Egg]

Last night I was driving and my engine temp came close to overheating. I had a cracked coolant tank last year so I remembered its signs. I filled the coolant reservoir twice and it drove fine for the hour ride. I woke up this morning and I was met with a slow start. After 3-5 seconds the engine started, but it sounded and felt as if it was only running on one cylinder.

I turned the car off, turned it engine back on. I’ve had a bad start or two in the past where it produced a misfire until I restart the engine.
To no avail, it still sputtered... I let it run and gave it some gas. Tho misfire(s?) gradually went away as the engine rpm leveled out. I left it run and topped off the coolant one last time before I tried driving it.

It drove fine. I stopped for gas, when I turned the engine on I got the same slow start. I did see once a white cloud come from the exhaust when I did not give it gas when starting.

I have a bad exhaust leak. Directly after the flex pipe the exhaust is snapped in half… it’s been like this for 2+ years. Money has been tight and its an an expensive part and I dont know a welder that good..

Any advice would be greatly appreciated.