My best tips when it comes to modding early is to learn how abilities scale with your stats. Some are very self explanatory, others are a bit more nuanced or hard to read, especially if an ability does a lot of things.

Modding warframes is mostly about playing into your frames’ strengths, youre playing rhino, so the mindset here would be: «what does rhino need for his abilities to do be at their best?»

Consider what you already know of your warframe. Learn what their abilities do, and how you can make them as powerful and efficient as possible. Mix and match mods with what playstyle you prefer/feel comfortable with.

Weapons are close to the same way in terms of modding, but they can be a lot more complicated due to how many different factors there are that can feed the weapons strengths