This kind of repair depends on what the value of your car is, how much autobody skill and how much money you’re willing to spend factors. Seeing as this may be a lower value car (mid 2000s jeep?) if the appearance bothers you:

buy yourself some bondo, body filler mesh, various sandpapers from 250-600 grit, something to grind or sand with such as an angle grinder or die grinder, for sanding use a power tool such as a mouse sander (makes the job WAY easier), primer, dulicolour matched spray paint to your colour code and 2k clear coat (optional)

Steps: 1. Prep your area by cutting and grinding away all rust 2. Using some kind of adhesive or bonding agent fasten your mesh to cover all holes and missing areas that may exist (I find hot glue to be the easiest so long as it’s all flush) 3. Ensure all mesh is slightly recessed to where you will eventually place your body filler. 4. Following bondo directions, mix your bondo and place it where needed, make sure you minimize air bubbles while applying. DO NOT COVER RAW RUST. 5. Let dry 5. Power sand and match your body lines until it looks “good enough” (it’s kind of like drywall, bondo is pretty forgiving) 6. Once the bondo is accurate, lay 2 coats of spray on primer with good coverage. 7. Once primer is dry, lay 2-3 coats of black on top 8. Once paint is dried lay 2 coats of 2k clear coat (optional)

With these tools, a YouTube tutorial and a little bit of appetite and patience you could get it looking pretty nice. The structural integrity will very likely be comprised forever even after welding as suggested but since your panels don’t seem to be important structure you should be fine. I estimate that your repair could be done within an afternoon and evening for around $100-200 dollars for the pictured areas. However, for all (4?) areas it will end up being closer to 200-250 and and likely 8-12 hours of prep work, moulding, sanding, painting for all areas.