Hi Stephane,
I'd love for you to take a look at some of the posts I've done very specifically targeting new real estate investors. You'll see them by going to this link:
http://www.biggerpockets.com/renewsblog/author/shaebynes/
I think your buy & hold strategy is a good one, but from experience I feel a responsibility to tell you that it absolutely critical to have reserves..a good 3 months or so of cash to deal with vacancies and other things that WILL come up.
Have you networked with other investors in your area? You can do that right here on BiggerPockets and also via your local REIA meetings.
I found that there were investors who were very willing to share their experiences and give tips on which things to avoid, which title companies were the best for wholesalers, things like that. You definitely want to start talking to people.
I wish you the best and please do check out a couple of those articles I wrote because I think they may help to address fear and getting started.
Wish you the best!