People about Cosplay...
The only place it should really matter is in competition. Don’t enter a workmanship based contest with something that you bought or commissioned, and don’t take credit for the work of others.
That said, some contests have a category for commissioned or purchased costumes, you would be fine if you entered there.
I enjoy comics too, mainly Judge Dredd, actually nothing else to think about it. I’ve got T-shirts, computer games, loads of comics / books, an Oyster card wallet, badge and cufflinks of JD. You could say I’m a fan. At comic conventions I take interest in seeing the various folks in costume. It’s not my thing, but I get their enthusiasm.
One of the team on my current client in Holland is a huge Star Trek fan. He has all the films and all the episodes. At the moment he’s collecting a part work of all the space vehicles. He goes to events but hates seeing anyone who dresses up and is out of character. “No one from Star Fleet smokes, carries a beer or spends their time on an iPhone”. He doesn’t do cosplay but appreciates those who take the time to add something to the atmosphere of an event by doing it well.
Watching my shy 8 year old and his 10 year brother with the Star Wars guys at a convention made my day. These people enjoy spreading joy. To me, that act of generosity is a big appeal.
I would recommend starting out with something simple.
At my very first anime convention, I only had about a month to prepare and didn’t watch a lot of anime. I did Android 18 from Dragon Ball Z as I had most of her outfit already and had the right hairstyle for it. I only had to do a bit of alteration and get some extra items from eBay.
Each time I have cosplayed since then, I have expanded my range. I discovered I have a knack for props and makeup but am not very good at sewing. Therefore most of my best cosplays have involved some sort of prop or latex bloodwork. I am still practicing my sewing so I can incorporate that as well.
Play to your strengths and you’ll soon discover which areas you prefer to work in.