Have you listened to the first series of Serial yet? That's fantastic - follows a possible carriage of misjustice. It was a spin off from This American Life, which is quite interesting journalistic magazine show - I used to listen to it a lot, but haven't for quite some time as podcasts have moved on so much.
My Favorite Murder - true crime retold by 2 comediennes. Definitely my favourite, although start at or near the beginning as there are quite a few in jokes.
Adam Buxton is good, I especially enjoy his chats with Joe Cornish and Louis Theroux, they're very silly.
Louis Theroux's Grounded - new for lockdown. Really like his interviewing style, loved his interview with Helena Bonham-Carte4.
Paradise - another true crime but a story being reinvestigated by journalists and the victims' families. Great presenter.
Stuff You Should Know - does what it says on the tin. This one's good to listen to with kids. Very likeable presenters.
Once you start listening, there will often be ads and recommendations for others to try out, that's how I've generally gone from one to the next.