Seriously, it's really far from being what people say here and there.
Of course compared to more casual games, Elite's pace in terms of game progress is more of a slow paced.
I don't think it is comparable really to other games because the way an Elite game progresses, is really non-linear and it has nothing to do with most classic "character/skill leveling" mechanics.
Even though it is undoubtly important at one point, to start unlocking stuff like engineers and some ships...and that ship building plays a huge role in your success, Elite is mainly skill-based imo.
So as long as you set your expectations that: you won't have anything fed to your mouth and there's indeed a couple dozens of hours to master piloting and become really-really good", and as long as you also adjust your perspective that "there's no leveling system for your character and there's no skills-system, and your progression is really more about you becoming a better Cmdr, with a better knowledge of the mechanics for piloting and ship-building...
as long as you know this, you can't really go wrong and Elite stops to be the "everything is behind a grind-wall" that so many are talk-ting on different forums and hubs.
Most of these people just don't know what they are talking about. In fact, of all the games I played in my 25+ years of gaming, I haven't seen any other game where so much players saying stuff either they made up, or they "heard from a friend of a friend" but they have absolutely no idea if its real nor they have tested any of it for themselves...and players with ego so big that they cannot stand being unable to anwser a damn question, so if they don't know, they just spit false .
For, real, I have spent most of my early days in this game, just letting my curiosity lead the way, taking different kinds of missions in stations, just to get a grip on the different mechanics and learn my way around the game. No stress, no pressure. And even if I was in the middle of a mission and something seemed peculiar like, some planet and/or moon, go see closer, and to hell with the mission.
Then I spent a great deal of time, not thinking about "what ship I should buy next", and just focus into mastering one of the first small ships like the Viper III or the Cobra III (personally I was all about the cobra, 200 hours doing combat with it, solo-ing low and medium conflict zones with it being barely engineered, and only 1 or 2 first grades) and see "how high" I can take it with it. How better I can get, practicing my skills. Fiddle around with my ship build, discovering there's more to it than just making it "A-Maxed" (all modules at the higher tier grade), and that the different Grades have also different characteristic to them and which you could play with it to attain the specific needs you'd have (like less weight, better energy and/or heat efficiency, etc..).
And you know what? I don't regret any of it and I'd do the same if I could un-play the game and rediscover it.
Hope it enlightens you a bit.
No other games have ever reach the peak of awesomness that Elite Dangerous has procured me. It is incredibly fun and addictive.
I must be close (if not more than) 9k hours...and I know I have many more to come.
The other most valuable thing I could tell you is: this game is taken to another level surely if you join a squadron but, not too early, and not too long into in either. Being in a team is THE way to enjoy it to the fullest (ok ok all you explorers calm down, we're not all nuts like ya'll in the Bubble, and we make up the biggest portion of players so I think it's fair to say that rofl!)
o7