Lovely shots Andre, well done. Especially with a homemade tripod but I am sure that will make you appreciate the shots even more.
I like the first one the best, maybe you could try a bit of dodging to bring out some detail in the foreground rocks and perhaps increase the vibrance to bring out the colours in the sky a bit more.
On the second shot, I like the composition very much but I would be inclined to clone out the buoys, certainly the one on the right but probably both of them as they seem to draw the eyes away from the rest of the image.
Both are lovely shots and you should be very pleased with them.

Cheers
Steve