This is my last writingpost before I'm going to skiing.

You could say, "This is the last time I am writing" or "This is the last post". What you have written is technically correct, since "writing" can also be used as a noun, but it doesn't sound super natural

After my holiday I'm going to write about all my experiences.

I've the feeling, when I wear the white one that I need more confident.

When we have a break we drink a jug of beer and in the afternoons, or inat the end of the day we get a bombardino, thatwhich is a eggnog with cream.

I have my own ski boots, helmet and ski glasses.

I hope it'll be a good weather and we can enjoy fully the whole vacation.

I also need strong thights.

I still have a little time to strenghten yetthen.

As I mentioned in my previous parts, I'm planning to be in Folgerida in the last week of January.

"in" can be dropped. Makes it sound more natural, and does not lose the sense of the phrase.

I've the have a feeling, whenever I wear the white one I need more confidentce.

Sorry, but did not understand the last part. I'll assume you mean yourself to be more confident, to need trust in yourself. Even though you can keep "I've" as it will maintain the sense of the phrase, it sounds weird, similar to "ivy".

I think the white colour symbolizes the professionalism on the white court.