Unity was approachable in its early days. Now it’s a mess , not to say that there aren’t many fantastic games produced using it, but anyone coming to it now is going to find it very hard to get a foothold. Having had a good experience with it when it first started making waves I installed it for a family member recently and found the whole process excruciating, none of the tutorials seem to work out the box and there’s a lot of specialised vocabulary you need to know before you can make use of the tools. It seems like Unity is competing with Unreal now rather than going for the market vacated by Flash.