What is the difference between 和 and 跟...一起 ?Feel free to just provide example sentences.

Using 跟 (gēn) to express "with" is so simple and helpful, after studying it briefly, it will always be with you! 跟 (gēn) is a very common word that will help complete many other sentence structures

Subj. + 跟 + Person + Verb + Obj.

The word 一起 (yīqǐ) is used a lot with 跟 (gēn), expressing the idea of "doing something together with somebody." It may seem kind of redundant, but it's totally normal in Chinese to use both.
Also, for most of the examples below, 跟 (gēn) is interchangeable with 和 (hé), which you may remember, also means "and," just like 跟 (gēn) does.

Subj. + 跟 + Person + 一起 + Verb + Obj.