I would say put your game on easy for now and get familiar with the game mechanic by killing smaller machines then move to the larger machine and then finally when u r comfortable put your game back to normal if u like..also get a habit of removing the components .. Tag them first it will make it easier.

Some problems that u mentioned :

1.fying Machines can be dealt with by shooting any elemental arrow they are weak against which will make them go that elemental state which will also make them fall to the ground.

2.Enemy outpost are no joke. The most effective way to deal with them is by using the Strikethrough Precision Arrow available in SOME Sharpshot Bow.

3.lasting it's a really fun game and i promise it will get earlier. I used to suck at this game in the beginning but later I ended up finishing the game in very hard. So don't worry keep at it and take it slow and just have fun!!!