My first note.

Hello. My name is Raimundo. I was born and raised in Bogotá, Colombia and I grew uo up here.

* "born and raised" is a common way of saying where you were born and where you grew up as a child. 

At the momento I'm ending finishing my universitary studies of in Electronics Electrical Engineering.

I'm in my twenties. I leaned some of English in my College when I studied on the secondary high school.

* In the USA, college is called "high school," and university is called "college." It can be confusing! Are you familiar with this distinction?

I was 20 years old when I had got my first professional degree.

* Do you mean to say you were 20 when you got your first university (USA: college) diploma? Or high college (USA: high school) diploma?

When I was a kid, I used to play with my cousins in the street of in front of my home. Also, I hused used to play basketball with my family. I love swimming, I used to go swimming on the weekends but, at the moment I can`t anymore because I don't have as much free time. I was pretty good at swimming. I miss to do it.

(Can you correct me please?)

¡Una buena nota! 
(✿◠‿◠)