My old roommate gave me advice to play it like a numbers game, build a default message (as Zack said), and go. But he was also, frankly, both gorgeous and built, so there's a bit of a problem there.
What are the options for a guy who's a cat person, has a dad bod (but is not fat by any means, i weigh in the mid 150s), and doesn't like to take pictures of himself and therefore has a slim portfolio? (it's not that i don't like to do interesting stuff, i just never feel the need to document it. For instance, there are no photos of me at the Women's March, though i took many photos and even a video or two. Always feel annoyed when people i'm with pause the excursion for a group photo op).
You don't need a whole lot of pictures. Just 3-4 or so. Here's a safe guide:
1. Go somewhere scenic, have a friend photograph you alone in front of the scenery.
2. Play a sport or action-style activity (zip lining, jumping on a trampoline, riding a go-kart... anything really) have a friend photograph you in action.
3. Be in one group photo with 2-3 family members or friends at dinner or something.
4. Have one photo of you doing something you love like a hobby - video game convention, playing chess... whatever. Something that's very you (whatever that may be).
Boom, you're done. Your profile can be built in a weekend. Chances are, you have most of these photos already. Just make sure there are no selfies or repeat things. It should just illustrate some level of diversity in your life.
As far as the first message is concerned, honestly, it doesn't matter. 9 times out of 10 just keep it simple unless you're feeling particularly witty. If she wants to talk to you she will, but if you try to hard or overthink it, it's only going to work against you. Be comfortable with not getting a response because it will happen about half the time and there's nothing you can do about it. It's definitely a numbers thing.
I don't respond to about 90% of the women who message me. And I don't get a response from about 50% of the women I message. And of those that I do converse with, only a very small portion of those conversations turn into dates. And only a small portion of those turn into second dates and so on.
Realistically, go into it only expecting to have a
significant interaction with, at most, 5% of the total people you swipe with. To expect more than that is unrealistic for most people.