Hey Maigais,
Welcome to LTS! Thank you for joining us. Glad the site could be of use to you while finding your way in the wonderful world of strapless riding.
Surfboards are very much a matter of personal taste, conditions, riding style, weight, etc. Some boards will work better for others, and someone's perfect board might not be the best choice for someone else. There is a lot of good information on surfboards in Jon's post. Check it out, and I am sure it might help you out:
Jon's Surfboard TopicOverall, if you purchase a kite specific surfboard you can expect better durability in most cases vs. a regular surfboard, not necessarily a better board. My advice for your first surfboard would be to find something used. You are going to be learning what you like, and what works for you. Usually, with a used board you can also try before you buy, which is nice to see at least if the board feels good to you.
As far as what to expect going strapless? Well, a lot of fun as with all aspects of kitesurfing.
You will face some challenges, but most of them are mainly mental, and muscle memory in order to get used to riding without the feel of the board directly attached to your feet. In a session or two you will start to adjust, and get better and better from there. There is also a great article from Jon on riding strapless that I think you will find very helpful. Check it here:
Jon's Surf Strapless ArticleAgain, welcome to LTS, and let us know how we can help you further.