Welcome to steem jorgerml! You seem like an interesting individual and those are some awesome pictures you got there. I'm a photographer as well though I haven't done any underwater photography yet.. Maybe someday!
If I could give you a few tips it would be to.. Find some communities or contests to be a part of, they can make your experience on here a lot more rewarding and enjoyable in my opinion. I would suggest @steemitbloggers as a good one and one that I'm a part of is the @ifc which is more of a contest but it's also a community as well of people who enjoy helping each other and competing in a friendly game. And also there's some good photography contests on here as well I would suggest looking for some of those!
After that I would suggest to socialize with others, visit other peoples pages and leave comments and try to make friends.. It might be useful to use the #introduceyourself tag to find and meet other new people as well. :)
And then finally just try to put out good content that people appreciate and grow your audience over time. It might be kind of quiet at first since you're just starting out and the crypto market has been kind of slow in general due to the lower values lately, though I think if you keep at it.. You might have some great results in time.
Anyways.. Good luck on here and if you have any questions please feel free to ask! I'll do my best to help and if I can't help.. I can probably/hopefully find someone who can.