I've been TTC for almost 9 years. I'm from the US. I went through IVF in 2018 from the surplus we got from selling our first home. I have four blastocysts left on ice, but one of them is a mystery and we're not sure if it's viable. I've gone through three blasts already, had two pregnancies from those and both failed.
It's pretty common to have a whole slew of tests done by REs (fertility doctors) before they will treat you. They do this for a number of reasons, but mainly to inform any plan they do give you. For instance, an HSG will see if your tubes are blocked. A 3D ultrasound will be able to see your uterus better than a normal ultrasound and tell you what shape its in. In my case, the 3D ultrasound showed that I have a unicornuate uterus. All of the normal ultrasounds I've had in my life before that one didn't reveal this information which was infuriating.
Doctors will give you a plan based on your tests. You might need to start taking thyroid meds, or perhaps your issue is just PCOS in which case they'll give you something like clomid or letrozole and hormone replacement therapy to get you to ovulate and prime your body for pregnancy. Treatment goes from "low-tech" (drugs plus intercourse) to "mid-tech" (IUIs), to "high-tech" (IVF). Obviously IVF yields the best results but is also the most expensive option BY FAR. Part of the reason it's taken DH and I so long is because we simply didn't have the funds to do IUIs or IVF. So, in a way, you can say we started getting super serious about TTC in 2015 (when all my tests were done), but we couldn't afford anything that would work for me until 2018.