Hello @Karsten and a warm welcome to TrustedHousesitters and to the Community Forum
Ahh yes, the Algarve is beautiful, we have just returned from there ourselves.
I have just had a peruse of your profile and it looks great and I see you have 3 references which will certainly help when trying to secure your first sit.
I have attached a couple of threads that you should find helpful.
Also, remember you can use the spyglass symbol at the top of the page next to the TrustedHousesitters logo and search for any questions that you may have as they have most likely already been answered on here and of course if not then please just ask!