Any advices before publishing comics?
Yes, find out how Lulu's Create works so you know what to prepare for. I would suggest uploading a PDF. If you have no real means of creating one then Word will Save As a docx as a PDF.
Things to keep an eye out for, tricks to make the book available for more people,
Well, the first 'trick' is to use one of the free ISBNs. But first look in Create for a format that can have an ISBN, because not all the books you can create here, can.
or even experiences comic publishers on LULU have been through?Thank you.
I think that you will find that most people who visit the Forum (very few nowadays) only do so while trying to publish, then they are never seen here again.
Perhaps it may be possible to contact one of these Lulu publishers and ask them? >> https://www.lulu.com/shop/see-more-from-shelf.ep?name=spotlight&categoryId=200011