I'm going home onfor vacation tomorrow and I'm so excited! I'm going home for vacation tomorrow and I'm so excited!

I've always wanted to travel abroad alone, but I always worry about safety issues, so I've keept putting off my plans. I've always wanted to travel abroad alone but I always worry about safety issues, so I keep putting off my plans.

You don't need that first comma. As for the second correction "putting off my plans" should be in the present tense even while it is something you started in the past. It sounds more natural this way. Grammatically I think this is because you've already used "I've" earlier in the sentence

I've always wanted to travel abroad alone, but I always worry about safety issues, s. So I've kept putting off my plans. I've always wanted to travel abroad alone, but I always worry about safety issues. So I've kept putting off my plans.

I have a different opinion than the other commenter. I think the comma is a stylistic choice and I would use it if this is one sentence -- its a complex sentence and the comma arguably improves sentence flow and clarifies meaning. "Kept" is also natural -- the question is whether you're emphasizing past decisions ("kept" is good) or your present state of doing it ("keep" would be fine). Both are natural; they have slightly different meanings. The sentence is fine but it is a more complicated construction than I'd use. The above "correction" is a possible substitute with two sentences. "So I've" is informal but would be fine in a diary entry. If it was formal writing/speaking, I might say "The result has been I've kept putting off plans" or similar, e.g., "Accordingly, I've kept...".

I've always wanted to travel abroad alone, but I always’m worryied about safety issues, so I've kept/keep putting off my plans. I've always wanted to travel abroad alone, but I’m worried about safety issues, so I've kept/keep putting off my plans.