Depends on what kind of place of work. What you learned there. Prepare for questions why so quickly gone. Have clearly, clearly it's justified. Overall nothing terrible happens people don't agree or s/n cheat. I would place 2.5 months left, about the second did not speak. The experience that you got there on the freelance to say that I scored.
Move forward no matter what. He did not agree with the boss, did not converge with the team. There have been delays on SN, I've been threw, sometimes the work just didn't fit, I've been thrown, because he did not suit them. A search of both work and worker, especially in IT is very, very difficult. Specifics of work from everyone, somewhere people work with a round sum and any misstep can be expensive, but somewhere the work is with a heavy Mat in the field of signal processing. Somewhere requires excellent knowledge of the device of the Linux kernel, and you have to work in terrible stress. And somewhere all at once, but compensation is appropriate.
Search warm place under the sun - one of the most important tasks of life. Must be approached critically, if something does not suit you should not stay long, probation is not only for the employer, it is also for you. For TC either party during the probationary period may terminate the agreement unilaterally with a warning for three days. It is a possibility without superfluous nerves to say goodbye and leave. If you get fired, it is impossible to take it very close to my heart. As a team, and you may not be suitable for a variety of reasons. All that you can is find out why and take note.
To notify a future employer you previously worked for 1 month or not personally to you. I can only say that for me it was a mistake. Not in the sense that I strongly regret it, just often very uncomfortable to talk with colleagues when it is necessary to insert "worked as a freelance", remembering his lie earlier and so on and so forth. If you want, better just keep quiet, do not have the experience. But in my opinion, this is worse than a negative experience. He is also experience, besides, I hope you didn't filoni from work and tried to complete the task. In this case, it definitely was a positive experience in the form of solved problems, which you have to mention at the device.
And Yes, while not working at his uncle work on yourself. It is very important not to sit and develop.
Specify the experience is always, regardless of what it for the duration. Sometimes it can make a huge plus when applying for a job, for example, the employee worked in a rather unique or specific region and has some knowledge. But be prepared that the employer will ask you why you left so quickly from an old job. The employer is very profitable, if it come to the worker who is already somewhat familiar with the technology or tools (don't have to tell everything from the basics).