This guide will help those who want to practice playing against bots or just have some fun. If you've ever faced the issue of trying to create a lobby alone and couldn't start the game, there's a solution through the console. Simply enter "map c1m2_Strreats versus" (you can change the numbers and the name), but remember, if there's not at least one player on each team, the game will close. To avoid this, download just one mod from the workshop:
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=121071656

You can also play with friends as infected, against bots as survivors. To do this, someone who has this mod needs to create a lobby, and now both of you can join as infected and play against bots

These console commands can help you train with bots, but they only work in single-player mode with "sv_cheats 1" enabled:

vs_max_team_switches 100: You can switch teams multiple times.
mp_switchteams: Teams swap sides.
sb_takecontrol [bot name]: Takes control of the specified bot.
changelevel "[map name]": Changes the map while keeping the current score.

Spawn Commands for Zombies:

z_spawn tank
z_spawn witch
z_spawn boomer
z_spawn smoker
z_spawn hunter
z_spawn charger
z_spawn spitter
z_spawn jockey

Other Useful Commands:

noclip: Walk through walls.
warp_to_start_area: Teleport to the start of the level.
give health: Refills your health.
sb_add: Adds a bot.
sb_stop 0/1: Bots stop moving and shooting.
sb_move 0/1: Bots stop moving.
sb_dont_shoot 0/1: Bots stop shooting.
sb_dont_bash 0/1: Bots don't use melee.
sb_open_fire 0/1: Bots shoot continuously.
sb_unstick 0/1: Stops bots from teleporting.
sb_give health: Gives health to bots.
director_debug 1: Displays information about the game process.

These commands will help you tailor the gameplay to your liking.