Farming:
Farming should take place at your tent, it allows you to produce things such as fibers and fruits in a low amount. When out and about and you come across items such as the ones listed above, using Outdoorsman on them will give you a small XP gain and the possibility of seeds (Similar to using Science on weapons) When you have the seed, use it a Shovel on a tile and it shall create a hole, use the seed on the hole and use the shovel again to bury it, water your new seedling and it shall grow, it needs water to continue growing with the possibility that it dies if not watered, use a Water skin on the Seed hex to water it. You also need to check for weeds every now and then as the Weeds may kill off the plant, examine the hex and it will tell you if there are weeds, to get rid of the weeds use a rake on the hex and you will De-weed it. when the plant is grown use a knife on it to harvest or just gather the items.
Fishing:
Fishing can take place at your tent, or in a tile close to water, to begin fishing go close to the shore and use your Spear on a water tile close to shore, you will automaticly stab the water for a few seconds, depending on your Outdoorsman you may or may not catch a fish, repeat a few times, you'll probably gain a small or Medium sized fish. You only gain one fish at a time using a Spear.
A Net can be created using Wood and Fibers and setup in the waters to catch fish, come back in a few ingame hours and you may have netted some fish, commonly small fish, nets have a tendancy to break so be sure to come back to check on them every so often, you may only set these up at a tent and your only allowed a maximum of 3.
A Fishing Rod may be used to fish ingame, used the same way as a Spear, you'll stay by the water fishing for a couple of ingame minutes, you may get a bite or not depending on your Outdoorsman, you may also use bait to increase your chance of hooking a bigger fish.
Note: for these activities, the maximum amount of OD is 100%, you shouldnt need any higher for this type of activity, by all means have it higher for travelling but with it maxed out at 100% for these activities everyone gets a chance to farm
What i mean to say is it gives a chance for even people with 20% to farm and fish and cook etc etc.