Answer to the OP I even after my many years of brewing do not have a brew fridge but use either the room or garage depending on the time of the year or most importantly to me I use specific yeasts at the room temps I have so Beoir for bitters/ales upto 21c Kveik for IPA's upto 35c and Novalager for Lagers upto 20c.
It is better to have temp control with a fridge but not everybody has the room or as you are just starting out and financial outlay needs to be kept low until you are grabbed by the bug and make it into a full hobby.
Yeast is your friend until you progress and it is surprising how well you can make a stable temperature in specific rooms/garages to suit the yeast.
good luck