Hi @Legatinka1,
If you want to get an account of RAK online compiler, please share the information in this topic:
It is now a commandline format, and maybe we can public a web version online compiler soon. 
About example source code, i’ve share in the above, but there is no http example yet. We can add a http example in that repo, but it will take some days because we are all in another projects now.
For other device, i think RAK5010 is a good choice, we’ve developed a new firmware for it, and it is based Micropython.