Basically every of these skills are mostly trained at Skill zone but you can do these in various locations, like home.
Woodcutting 
If you want to start training FM or Fletch you probably have to take WC also until you buy the logs..
Anyways to start up with the woodcutting you must tele with Skill teleport and get to skill zone and walk little bit to North and buy hatchet from Bob
NOTE: Buy Tinderbox and/or Knife if you want to train FM and/or Fletch!
Now you should have your hatchet ready

Now you should head SE and you should be able to see most of the trees.

What the heck is Doom doing in my picture? ^

At this point you should go to all the way to east for the normal tree, after couple logs you can already cut willow (you shouldn't care about oaks) then move on to maple and so on
List of Logs, how much exp you get and how much cash you get if you sell them at general store, also level reqruiments
Name: XP: GPs to store: WC Level:Normal logs 2000 XP 4 gps 1
Oak logs 2960 xp 20 gps 15
Willow logs 5540 xp 40 gps 30
Maple logs 8000 xp 80 gps 45
Yew logs 14000 xp 160000 gps 60
Magic logs 20000 xp 320000 gps 75
Firemaking 
Firemaking is basically burning logs in this server (There won't be fire when you light the logs) but you can still see the animation, You can do FM anywhere you want but I recommend collecting logs and burning in bank OR burn while you cut the logs.. Also FM is bit faster skill than Fletching
NOTE: There is no huge different on xps when you burn the logs!List of XP rate on logs when burnt and level reqruimentsName: Xp: FM Level:Normal logs 30220 1
Oak logs 30420 15
Willow logs 30380 30
Maple logs 30340 45
Yew logs 30300 60
Mage logs 30260 75
NOTE: Yes you get the most XP from Oak Logs, strange indeed..Fletching 
Fletching is basically making bows and longbows, also this skill is slower than WC or FM so be patient, you can also do this skill almost anywhere but I recommends you to collect logs and fletch in bank OR fletch while cutting logs and drop the bows.
List of XP when fletching logs, level reqruiments and selling price to General storeName: XP: Fletch Lvl: GPs price to store:Arrow shafts 400 xp 1 1 gp
Shortbow 400 xp 1 50 gp
Longbow 1040 xp 5 80 gp
Oak shortbow 1280 20 100 gp
Oak longbow 1920 20 160 gp
Willow shortbow 2640 35 200 gp
Willow longbow 3280 35 320 gp
Maple shortbow 4000 50 400 gp
Maple longbow 4640 50 640 gp
Yew shortbow 5360 65 800 gp
Yew longbow 6000 65 1280 gp
Magic shortbow 6640 80 1600 gp
Magic longbow 7280 80 2560 gp
NOTE: For some reason every other longbow expect normal needs the same lvl as the shortbow so it's not typo or anythingSelling logs or bows to General Store 
If you want to sell your logs and/or bows to General Store but you don't know where this will guide you
First you will have to type ::shops, then take a look at the mini map (Npc shown below)
NOTE: If you want just money you should only train WC and sell Magic Logs as they're worth over 300kThank you for reading my guide, feel free to comment or give me notice of typo or wrong information or tell me something that might improve my guide.
also I can make guides for something if you want.
I hope my guide helped you 