>>1562This. I will also say if you can use commas appropriately you are better than most native English speakers, as a point of motivation. I've also had professors with quite broken English, that are very successful in their fields.
>journals, conferencesDepends on the field really. Maths? Yeah you don't need to be forming extraordinary sentences. Psychology? A bit harder.
One thing I notice from your short post:
>when listing 2 things, using 'and' to join them you don't need a comma "my grammar and punctuation is terrible" is fine>however if you list three things you could say "apples, pears, and bananas" and use a comma, but this is preference https://en.wikipedia.org/wiki/Serial_comma (also called Oxford comma)Here's how I would write your first section:
>I am an ESLer, how do I improve my English writing? My grammar, punctuation, and written vocabulary is terrible.