Weepingwillows12
I think Hatha yoga is the type that was traditionally "mainstream" in the UK for decades. Good for beginners, not too demanding, often the type done in church halls, mostly women, and mostly more mature women.
Stlll a great style for beginners, but like everything fashion and demand changes things.
Forty years ago whan I started this was the type of yoga most commonly found. There were of course yoga centres- mostly in cities, that were specialist in other forms of yoga- Ashtanga, Yin, Igengar, Kundalini etc,
But yoga has boomed in popularity, especially in younger people who demand more challenging styles of "power" type of yoga for muscular strength, stamina etc.
Elements from more challenging yoga styles have crept into "general" yoga classes, and many use elements from other styles in a more mixed up delivery.
Nowadays it is quite common to hear " take a Vinyasa and we will meet in down dog" in a general yoga class- 20 years ago that would not have been the case.
Sorry if it isn't much help I think try as many styles as you can read a little about the different styles of yoga- some are more breath centred or spiritual, others very dynamic and will leave your heart racing.
Also depends what you want from your practice- whether it is to build strength, relax or become more flexible, each style offers something a little different.