[Plugin: Events Manager] Edit Event Submission Form – Hid Certain fields

yes, you can do that by modifying templates at templates/forms/event-editor.php

to use templates – https://wp-events-plugin.com/documentation/using-template-files/

Is it difficult to do?

I am not a programner yet know some basic html

no, because it is in html format and descriptions are straight forward

Ok thanks, I managed to remove the category list, yet how can I show certain attributes and not others

you can use placeholder like #_ATT{event_attribute} at settings > formats/layouts > events format which you can define in settings > general > general options > Enable event attributes? set to Yes and Event Attributes e.g. #_ATT{event_attribute}

https://wp-events-plugin.com/documentation/placeholders/
-see section Custom Attributes

Yes I did that. I have 6 attributes yet I only want 3 to, show in, the event submission form. How can I do that?

This isn’t an option, you’d have to edit the submission form template yourself (templates/forms/event-editor.php), or alternatively, try using CSS to hide those fields.