Let me tell you:
When you think about a feature, it sounds like much work!
Now take the amount of work you think you will face and multiply that by 10!
There is so much stuff you have to account for! It's unbelievable! Have you thought what might happen if an actor drops out halfway through the film? What if your soundguy won't turn up? These are all things you have to consider!
Also, where do you want to show your feature? There is a much smaller audience for an unknown film maker, who is making a feature. A short can be shown on the internet. A feature is kind of critical!
Consider your production time as well! We shot a scene from one feature film, to use as a promotional scene for funding purposes. 3 Pages in the script, not too many lines. One single location, bedroom and hallway. 8 hours shooting day! Consider what you have to do on set! Relight scenes, plan your camera moves, DIT work, slating each scene to make the edit go smooth, caring for your cast and crew and making brakes.
It's all something to consider! It's a lot of work, but I am confident that you can do it!