Software Update and apps

You can’t.

Your iPad is too old for any more iOS upgrades/updates.

Sorry.

If you need/want an iPad with an up to date iPadOS with access to current, updated apps, then you really need to seriously consider a new iPad model OR a much, MUCH “newer” and less expensive, refurbished OR used iPad models, from better known, trusted Apple product/device retailers/resellers, locally or from on the Internet, capable of running the latest iPadOS versions. There are PLENTY of newer, older iPad models that can run the latest, current versions of iPadOS.

Sorry & Best of Luck to You!

Unfortunately, you cannot get the latest iOS version, or the latest apps on that iPad. Here is a link to the newest version of your iPad. I have the newest iPad mini, and I love it! I think it would be great for you! https://www.amazon.com/Apple-iPad-Mini-Wi-Fi-64GB/dp/B07PRD2NQ7