It always seems to me that I am not developing, at first I set big goals and plan to finish them in a month, although usually such goals are completed in months and not in 1 month, then I want to take a break from this?

 You will benefit from the SMART goalsetting approach.

Specific, Measurable, Achievable, Relevant, and Time-Bound

If your goals meet this description, then you aill have realistic timelines. Also have mileposts, so that you can celebrate those instead of coming to a full stop.

If it takes months longer, it means that you set unrealistic goals and it hurt your achievement in the process by demotivating you. Have challenging but SMART goals.