Suggestions to make it sound a bit less formal

What I'm going to do today

First of all, I woul'd like to say hello to everybody, as this is my first notebook entry. I'm currently at work now, but I've run out of tasks and at the moment I'm waiting for my team to come up with something. ThusSo, I have time (but on the other hand, not so very much) to write here.
I'm going for lunch in half an hour with my boyfriend, who is working in (at/for  - either sound slightly better than 'in') the same company. We are planning to go to a new cafe near our office. I hope they serve some delicious pancakes, as this is something I would love to eat.
After work I'm going to go for a walk with my friends, whom I haven't seen for... about 6 months, I guess. It will be a great fun, we always get on well and have many topics loads to talk about. And I'm looking forward to the semifinal match tonight :)

I'd agree - really good!  Most of the things I've mentioned aren't mistakes, they just sound a bit formal for conversation - but I expect other people would say mine was too chatty!

Hope the pancakes were good. I think I might have some for tea... :)

What I'm going to do today

First of all, I would like to say hello to everybody, as this is my first notebook entry. I'm currently at work, but I've run out of tasks and at the moment I'm waiting for my team to come up with something. Thus, I have time (but on the other hand, not so much) to write here.
I'm going for lunch in half an hour with my boyfriend, who is working in the same company. We are planning to go to a new cafe near our office. I hope they serve some delicious pancakes, as this is something I would love to eat.
After work I'm going to go for a walk with my friends, whom I haven't seen for... about 6 months, I guess. It will be a great fun, we always get on well and have many topics to talk about. And I'm looking forward to the semifinal match tonight :)

Well done! Those pancakes sound delicous ;)

What I'm going to do today

First of all, I would like to say hello to everybody, as this is my first notebook entry. I'm currently at work, but I've run out of tasks and at the moment I'm waiting for my team to come up with something. Thus, I have time (but (on the other hand,) not (so) much) to write here.
I'm going for lunch in half an hour with my boyfriend, who is working in the same company. We are planning to go to a new cafe near our office. I hope they serve some delicious pancakes, as this is something I would love to eat.
After work I'm going to go for a walk with my friends, whom I haven't seen for... about 6 months, I guess. It will be a great fun, (and) we always get on well and have many topics to talk about. And I'm looking forward to the semifinal (match) tonight :)

Very fluent - well done!