I start with small golems i like to smite first one and then use phoenix stance if u want you can use health pot then go to wraiths then wolfs at that time u shud get lvl 3 then go to base buy boots of speed or long sword if can.Now go to blue buff and after that red buff now your lvl shud be 4-5 or maybe even six depends how well u are going.AT lvl6 i usually start ganking or help pushing turrets.If you want you can jungle more or go to lane.

With udyr and with this build you are pretty tanky so if your the only tanky in your team you must go first to teambattle if not then w8 to the other tank to go first.With udyr its easy to gank because of bear stance it gives you attack speed and it stuns thats realy great.In late game try to get down lonely pushers or backdoorers because then its easier to push and win.

To summary i would say udyr can tank well and be and dps very well.If those 2 can be together it means that hero is pretty great.