It was a gift by working at my company more than10 years.

I received the extra vacation as a reward for 10 years’ service.

I hadn't had such a long vacation, so I didn't decide my plan very first time.

I’ve never had such a long vacation before, so I didn’t know how to spend my time.

In the wake of a pandamic outbreak, I couldn't get a journey.

Because of the pandemic, I wasn’t able to travel anywhere.

So I stayed at home and I tried to do some things at home.

So I just stayed at home.

Firstly, I arranged my sons' pictures which wereduring 4 years and made albums.

First, I sorted all the pictures of my sons from the last 4 years into albums.

Pictures in my phone went out into the world.

I finally shared all of the pictures which had been on my phone.

(I’m guessing your meaning a little.)

Another thing is that I reviewed my journals and wrote in my ideas for my future.

Secondly, I went back over my old diaries and wrote down some ideas for the future.

I have written journals since 15 years and they are helpful to know myself.

I’ve kept a diary since I was 15, I find they help me better understand myself.

I could find out that I already have a lot of potential to archive my goals.

Not sure what you mean here. Sorry!

With this vacation, I could know more about myself.

I learnt more about myself during this vacation.

And these thinkings will be helpful to live an interstring life.

What I’ve learnt will help me to live a more interesting life.

It was a gift by working at my company more than10 years.

It was a gift for working at my company for more than ten years.

I hadn't had such a long vacation, so I didn't decide my plan very first time.

I haven't had such a long vacation before, so I didn't decide on a plan at first.

In the wake of a pandamic outbreak, I couldn't get a journey.

In the wake of an pandemic, I couldn't travel.

So I stayed at home and I tried to do some things at home.

So I stayed home and I tried to do things

Firstly, I arranged my sons' pictures which wereduring 4 years and made albums.

First, I arranged my son's pictures which were taken over 4 years and made albums.

Another thing is that I reviewed my journals and wrote in my ideas for my future.

Another thing is that I reviewed my journlas and wrote my ideas about the future.

I have written journals since 15 years and they are helpful to know myself.

I have written journals for 15 years and they are helpful in getting to know myself.

I could find out that I already have a lot of potential to archive my goals.

I found out that I already have a lot of potential to achieve my goals.

And these thinkings will be helpful to live an interstring life.

And these thoughts will be helpful to live an interstring life.

From Mar.ch

It was a gift byfor working at my company for more than 10 years.

I hadn't had such a long vacation, so I didn't decide my plan very first time.

You need a time-frame for "hadn't had", e.g. I hadn't ever had, or I hadn't had such a long vacation in years/in a long time. I'm not sure what you mean in the second half of the sentence, sorry!

In the wake of athe pandaemic outbreak, I couldn't get a journey[transport option, e.g. a flight, a train].

Firstly, I arranged my sons' pictures which wereduringfrom the last 4 years and made albums.

Pictures inI sent the photos from my phone went out into the world.

It'd perhaps be better here to say "I sent ... to friends and family", if that's who received them.

Another thing is that II did was reviewed my journals and wrote in my ideas for my future.

I have written journals since I was 15 years and they are helpful to know myself.

I could find outBy reading them, I could see that I already have a lot of potential to archieve my goals.

With this vacation, I couldnow know more about myself.

And these thinkingreflections will be helpful to live an interestring life.