Is it difficult to change the tie rod ends yourself? Any good links?

Not to bad really. Either use a pickle fork or a BFH to get the tapper shaft released. No, I don't hit the nut or threads but the knuckle where the ball stud passes through. After changing them I usually rig up a pair of 4 foot 2x4 to the tires and measure the front and rear toe to get it at least close then take it to a shop and have it aligned. It might be just smarter to skip all this and have the shop install and align it in one shot.

I am doing this myself right now and it is not too bad at all. I second the BFH method for the tie rods at the knuckle. They popped right out. Had to use a pickle fork for the drag link at pitman joint. And yes measure the distance before you start breaking stuff apart so you can get it close. Also yours should have the nyloc nuts instead of the castle nuts, so pick up some new ones before hand if they don't come with the tie rod. They can be hard to find on a Sunday afternoon. M14x1.5 as I recall.

M14x1.5, good tip!