Make sure you check the spacing on the rear hub. Track spacings are 120mm. Most road bikes are 126 or 130mm. You may need to buy a new axle and put some spacers in for it to work. MEASURE YOUR SPACING YOURSELF!!!

Do not buy cheap cogs. These will tear up your hub if you start to do hard core stuff (I recently found this out!!!).

After you get your wheel built you will have to deal with chain line. Hopefully it will not be too far off. If it is, you have some things you can do to change it.

You should decide if you want 1/8 or 3/32 drive.

There are plenty of sites mentioned on this forum to help you out with these decisions.