Unfortunately your in a territory that is very opinion based. The specs you list are not a bad starting point provided you understand the limits your budget brings.
Overall the bike will be strong enough and components will be reasonable. A more expensive bike will be lighter with components that last longer and perform better. Heavy off road use of an entry level bike will wear it out faster than a more expensive bike, but for occasional off road use the durability of the bike will be fine.
Brakes are not great - this means you need more arm strength to activate them and have less fine control (feathering). End result is you have to brake sooner and longer into corners, meaning you ride slower, and if your forearms can become worn out put and end to an enjoyable ride. Obviously this depends how technical the tracks are, and how much down hill is involved, and how skilled and brave you are.
The forks should be the focus for you. They will be fine for anything you can roll over but obviously not as good as better forks. Cornering will be impacted to the point you will be slower than guys with decent sticks up front as cheaper forks are less capable (though design and lack of adjustments) of keeping the wheel planted firmly on the ground. This means things get unpredictable sooner, requiring slower speeds. Slower cornering means more braking and more acceleration, meaning more work for you to keep up. Due the lack of adjustments, you will find the forks mean your arms are doing more work than those with better forks to compensate. This work is tiring on the upper body.
Jumps would not be recommended. A bit of air won't hurt the fork, but a bad landing with a meter of air on those forks and the bike will not forgive you. On better forks, the progression and damping adjustments and controls means that far more of a bad landing it taken up by the fork.
All the above said - the difference going up 10% or 20% in price won't be huge performance improvement (diminishing returns applies to bikes more than many things), so what you need to do is buy the bike you can afford, and get out and ride it. I and certain you will get advice around 'future upgrades'. I strongly suggest you avoid buying a bike with a view to upgrading it in the future, with a few exceptions, its a very expensive way to get a better bike.