Start 1-99 firemaking by talking to "Bob" at home, then once ur in the shop buy a tinderbox.
Next you will do regular logs from level's 1-30
Next from level's 30-45 burn willow log's
Now from level's 45-60 burn maple log's
Now from level's 60-75 you will burn yew log's. It is much more difficult because you have to cut your own yew log's and you can get to yew tree's by going into your quest tab, click on "skill teleports" and click on "woodcutting" and there should be a yew tree near. (for level 3 skillers, there are spiders there so turn off ur auto retaliate)
Also with level's 75-99 it will be very difficult to get 99. You will need to burn magic log's but they also are not sold in the skilling shop, "Bob" so you will need to cut these yourself. Now there is two places you can cut magic log's, so if you are a donator, you can cut magic log's at the donator zone or ::donatorzone, but if you are not a donator you can find magic tree's in camelot southwest of the bank next to the ranger's guild.
Goodluck.