Regardless if you have play or not DnD baldurs gate 3 shows a perfect example of a DnD campaign. It shows you the rules, the spells, the system everything just like DnD 5e, while you can't do your own role play and is based on options, there are checks on history, arcana and many others that would be done in a real dnd campaign. There are many outcomes depending on what you choose, you can achieve the same objective doing it in plenty of different ways and of course is fun as hell to roleplay as a good guy that will protect everyone or a bastard that will destroy everything on his path.