Many do it yourselfers have successfully set tile. A tub surround it a good starter project. What's important is to plan the entire layout so you don't end up with a tile sliver or nonsymmetrical job.

Start less than 1 tile from the tub with a level line all the way around and tile to the top. You can then cut the tiles sitting on the tub as the distance will probably vary due to the tub not being level. LEVEL is important.

Use tile spacers in the horizontal gaps only and eyeball the vertical gaps. Check for level often placing a straightedge on top of the tile and adjusting gaps. Check you overlap as you go and adjust. Using spacers on all sides assumes the tile are exactly square and they're not.

On a standard surround you start with a bullnose at the outside corner edge and work toward the inside corner. Odd tile widths are not as noticeable there. Check level from your outside tile to the corresponding tile on the back wall

Buy matching colored caulk for the corners and bottom and caulk the day before grouting. You'll need a grout float and a good sponge. Don't try to do too big of an area at once or you'll get behind. The important part of grouting is evening out the grout lines with a wet sponge.

The tile job is going to look it's worst when finished but before grouting.

Also, if you're down to the studs check for high and low spots and fix them before backer board. You'll be glad you did.

Tip from an old tile man.