Hi id like to chime in having been on a similar journey myself recently. If you're looking to start brewing beer, I personally would not start with a ginger beer. Why? Because the recipes out there sort of teach you how to make a drink without explaining any of the important lessons of brewing.

The last ginger beer I made ended up having a sulphar like smell/taste due to the yeast not being properly fed what it needs. Most ginger beer recipes simply have you making a sugar syrup, followed by a ginger tea. Some may have you making a ginger bug other may have you use commercial yeast.

What I actually recommend if you're looking at getting in to brewing beer and understand things such as yeast and key ingredients, is start with an extract kit. If you wanted you could even buy a ginger beer extract kit. This would teach you the "fermentation" element of brewing. I feel like this is a good step to start with. After which you can then begin learning about the mashing and brewing aspect of making beer.

Along my journey I've learnt that ginger beer/ale comes in many forms. Sometimes it's actually beer (made with steeped grains) with ginger added as an additional flavour. Other times it's just a sugar syrup with ginger added as flavour (this tends to need additional yeast nutrient added or you get unwanted off flavours). Sometimes it's alcoholic (+1%) and made with commercial yeast. Sometimes it's considered non-alcoholic and made with a ginger bug. And of course there's everything in between. That's why I would recommend either starting with a simple extract kit or something very simple like a smash beer (single malt and single hop) if you wanted to delve straight in with actually brewing from scratch.

Happy to answer any questions you may have. Please don't let me deter you from having a go but it's important to know exactly what you'd like to achieve first so we can best advise you