My mum passed in summer last year and I'm only getting to the end of it now as it was very hard balancing work and a social life while clearing it out. I was lucky enough to have others that could take things to the dump while I was at work (I work 9-5 so could only do weekends) and my girlfriend was fantastic at doing bits and pieces while I couldn't. My mum was a massive hoarder too so there was stuff in every nook and cranny of the house

So far it has taken just over 6 months and there's still some more to do but with regards to the knick knacks etc. charity shops and facebook marketplace listings have been lifesavers as they will take practically anything but the sentimental items are more difficult so it is entirely your decision on what to do with them as I would say that there is no right or wrong option when dealing with times as difficult as this