Welcome to you as new mapper,
I agree with talkat that you will not overload the OSM map with your “very detailed” information. 
Every Information you add will be helpful. No matter if its a GPS track, a POI, a housenumber or a trail that you are not very sure where its located but you know its there.
Just take a look onto cities in Europe like London, Berlin or Amsterdam. Every tiny thing you can map is already there.
Israel will become the same way in the future and of course it will be helpful in the future to have that “tiny little trail” that you think nobody needs today.
A hint:
If you find a problem or missing area please define it on the following website so somebody else can fix it. Also very nice to use as “todo” list for yourself.
http://openstreetbugs.schokokeks.org/?zoom=9&lat=31.52522&lon=34.84218&layers=B00T
Have fun by mapping 