Advice understanding caravan manufacturers & model

Hi Fairly newby and novice to caravanning. Got our 1st van back in 2019 (2010 coachman Amara 520). It's a side dinet which was fine at time to see if we took to it - we have but kids are slowly getting bigger (3 & 7) so thinking of upgrading to newer van with fixed bunks.

We are completely unfamiliar with caravan makes and ranges. Anyone know where I can find a good source of information that lists/explains manufacturers their ranges and general good/not so good advice.

Probably be looking at a 3-5 year old van.

Rummaging round the internet but struggling to find a single source (website) of information.

Many thanks