start looking a species that is able to hold our weight and is passive. start looking for underwater caves.
take 55% of all able bodied men into the army. arm them with spears. start producing bows and arrows. dip the arrows in feces. start taking volunteers for the army. send a group of 250 miners to the area with flint. make medium sized clubs and bark shields. use the gathered flint to make farming equipment and flint hatchets, knifes and arrow points.
new tribes have been discovered living along the lakeshore, it seem to be a hub for human activity due to its rich resources. the tribes seem relitively peaceful but not much is known about them as their people are rarely sighted.
also hide tents have been created, to act as portable shelters. your people are looking for new varieties of edible fruit trees growing by the shores of the lake, and herbal medicine, make from antibacterial roots has been crated. a tribal rule system has been crated and anyone who breaks a rule will either be banished or killed. recently dead humans are being cooked and eaten like any other animal in times of food scarcity, but this may spread disease.
Mrpineapple:simple animal traps (a hidden pit with wooden spikes in) are now being built by your people, allowing food to be gathered with less effort then hunting. limestone chip tipped wooden spears are being used by hunters. better and sharper stone tools are being created, and smaller compact stone knives have been made.
also the current technology is around mesolithic level ie the mid stoneage. and you only have 10000 population.
7shotsolo: 200 soldiers are being trained. 10000 soldiers are completely impossible as that is that would take your entire population
R4WLYX: i am going to void your orders, as you are now starting in a different location.
plants: there are quite a few edable berry bushes in the grasslands, and they make up a large proportion of your peoples diets, although due to your proximity to the wastelands life is harsh and difficult in your area, and little grows. there are many poisonous plants and berries in your area, identifiable by their bright purple and yellow colours.