Model Slipway are certainly very good and the kits go together well but you haven't said what sort of preference you have as there are a vast range of subjects.
If you are going to put a fair bit of effort into a build, and more power to your elbow, then you need to find a subject which appeals to you.
A kit is an excellent introduction to boat modelling as the manufacturer has done all the design work and if you build to the instructions then you are virtually guaranteed to have a good model that performs well. And the experience will stand you in good stead for future projects.
If the Model Slipway subjects appeal to you then you will have seen their home page which makes recommendations for beginners or modellers with experience in other fields. Advice worth following.
**LINK**
All very good advice and you will get excellent after sales support if needed. People on this forum will be happy to offer additional advice if asked.
Colin