Arguably, for your stated aim, your principal aim will be to choose an iPad that is capable of running the current version of iPadOS - this being iPadOS 26. In addition to the latest models of iPad being launched this week, you should consider any of these models:
- iPad Pro 13" (M4/M5)
- iPad Pro 12.9" (3rd generation and later)
- iPad Pro 11" (1st generation and later + M4/M5)
- iPad Air (3rd generation and later + M2/M3)
- iPad (8th generation and later + A16)
- iPad mini (5th generation and later + A17 Pro)
The iPad Pro is the most advanced of available iPad models. By contrast, the base "iPad" is the budget end of the available models. Between these two extremes are the iPad Air models, offering high performance at a more affordable price than an iPad Pro. iPad mini is an entirely different proposition, offering a more portable smaller screen.
As for which model is best for your needs is subjective and can only be determined by you. You can directly compare iPad models and there specifications here:
https://www.apple.com/ipad/compare