The future at My Hope for the end of the Summer

Today, for the first time in for this spring, I went to running. I ran for 5 five kilometers with my roommates. I think that it is a good starting point for the future runs. I would like to be able to run for 10km ten kilometers [if you like to use 10km, then you should also use 5km for consistency] for by the end of the next summer. Then, In the next summer, if I will have [the] time, I also want to visit some cities like Warsaw, St. Peterbourgh or Bruges. However, I am not sure if I will have [the] time because maybe I'll may have to start working as a web developer in for a company near Venice. I hope that in the by next summer I can go to a lot of had attended/gone to/ many concerts.

The My future at by the end of ("the" is optional here, you can also add "this") summer

Today, for the first time in this spring, I went to running (could also be "I ran" or "I went on/for a run". I ran for 5 kilometers with my roommates. I think that it is a good starting point for the future runs. I would like to run for 10km for by the end of the next summer. In the Next summer, if I will have time, I also want to visit some cities like Warsaw, St. Peterbourgh Petersburg, or Bruges. I am not sure if I will have time because maybe I'll I may/might start working as web developer in for a company near Venice. I hope that in the next summer, I can go to a lot of concerts.

The future at the end of the summer

Today, for the first time this spring, I went to run. I ran 5 kilometers with my roommates. I think it is a good starting point for future runs. I would like to run 10km by the end of next summer. Next summer, if I have time, I also want to visit some cities like Warsaw, St. Petersburgh or Bruges. I am not sure if I will have time because I may start working as a web developer in a company near Venice. I hope that next summer I can go to a lot of concerts.