Welcome. Almost everyone starts out on a hardtail. Full sus is more fun but nothing wrong with a good hardtail!
As you become more “skilled” you’ll find your speed increasing.. Full sussers do grip a bit better on bumpy climbs depending on setup i think, but some prefer hardtails for the more direct power delivery ehen pedalling uphill.. Again, there’s pluses and minuses to both types but the majority of folk (I’m guessing) on here prob ride full sus for a reason. It’s a bit comfier, it grips well on the ups, and is fun on the downs.
Nothing wrong with a HT though, ride it till it breaks, then consider upgrades.