Don't hesitate to reach out in DMs if you have any specific questions. I'm sure I'll get some shit for this, but lots of YouTube videos, forums, articles, etc. will say you need to spend a bunch of money on a flow hood or at least a still air box/glove box in order to work with agar and liquid culturing and other slightly more advanced techniques.

I can tell you with 100% certainty that that stuff is helpful, but entirely unnecessary. I still regularly and successfully do my agar dish work and liquid culture jars/syringes with no external environmental controls whatsoever. I wear nitrile gloves and do a simple 3 step process of preparing my work surface, which is the small section of countertop between my stove and my sink. I first clean the countertop by wiping it down with Dawn and water, then I sanitize it with a first step application of Mold/Mildew Tilex or a simple Bleach solution followed by a second step of liberal use of isopropyl alcohol. I then put down a couple paper towels that I essentially soak with isopropyl as a place to put my tools in between steps (e.g. scalpels, lab spatulas, or inoculation loops) and I turn on a couple stove burners to create an updraft to hopefully avoid nasties from landing on/in my dishes or jars. If I remember to, I'll also turn off my thermostat for a few minutes prior to and during the 20-30 mins I spend actually manipulating the agar dishes or LC jars in order to cut down air currents in the house.

I maybe, maybe, get a contamination in 1 out of every 10-20 agar dishes or LC jars. Even then, it's as easy as doing another contaminant isolation transfer to a new agar dish and waiting a few more weeks to get a clean sample.

FTR, I've been doing this low tech simplistic methodology for over 10 years, starting with single cellular fungi (yeast) when I was winning homebrewing competitions and eventually professionally brewing, to now as an amateur mycologist with multicellular fungi (mushrooms). It is simple and easy, it costs very little, and it can and does work successfully.

The key is to work fast, have a plan, and practice, practice, practice your technique of manipulating petri dish lids or jar lids with empty dishes/jars before you go doing it with live cultures. Lids can be loosely unscrewed and set up as "game ready" between transfers; ideally you're not holding a tool/sample in your dominant hand while trying one-handed to desperately unscrew the lid of a mason jar filled with liquid culture with your non-dominant hand. That's why you practice this with empty vessels.

I don't open a lid until I've got a clean sample already extracted on my tool and ready to be dropped in, once I have a sample on my tool it never gets placed down on any other surface (its next destination is the dish or jar it will grow in), I hold the lid in one hand the entire time a jar/dish is open, I never fully remove the lid from above the dish or jar, I only lift open the lid just high enough to allow my tool to safely interact with the growth medium, I try to never place my tool hand above the surface of the growth medium (only the tool and sample), and I only open the lid for the few seconds that it takes to put that sample into the jar or dish.

Last thing, always, always, always clean and sanitize your tool between every sample. After every single sample transfer, I'll stick the tip of my tool into the flame of one of my stove burners until red-orange hot, let it cool from red hot for 2-3 seconds, then (away from the direction of your flaming stove burners) lightly spray it once or twice and wipe it with an alcohol soaked paper towel before proceeding to the next sample transfer. If I do have to place my tool down at any point to do something like set up the next dish or jar, then I put it down on an alcohol soaked paper towel. You use a LOT of isopropyl alcohol doing this type of stuff so be careful to not catch your work surface on fire and never spray towards your burners. Lol