Hey man,
I am from the uk , my wife committed last year . I can tell you from my experience . The police did a quick sweep of the house. Checked the bins to see if she'd been drinking /taken anything but nothing deeper than that.
It takes a while to do an autopsy as well. It took more than two weeks for my wife to have an autopsy and took 10 weeks to complete the toxicology report .
The inquest is even longer . She hadn't left a note so they took all her digital assets , phone , laptop, Fitbit. Even her vape. It took them a while to return it Tom. About 8 weeks.
My situation was a bit different . My wife had committed with a plastic bag over the head . I came home and found her and ripped the bag off
Tried to revive her but it was clear she was dead and called my mum who called the emergency services
First the ambulance crew arrived in about 15mins, then the police about 30 mins after I found her. Detectives about an hour after that
I was distraught obviously but the police kept asking me how I thought she died and took them a while to see the plastic bag and em to tell them. She was clearly dead but hadn't been for that long , a few hours and looked very peaceful like she was asleep. Without the bag on they had to investigate it but I think had they found her hanging or some thing they wouldn't have been as detailed in the investigation
Anyway long story short the autopsy couldn't detect a cause of death. So they had to run extra tests and still couldn't find a cause of death and it went down as a suspicious death as it couldn't be explained as the police hadn't found her with a plastic bag over her head .
It's hard to say if they will take your phone etc, I think if it's obvious then they might not but then they might . It's down to the coroner and in the uk the look at the reasons why, if you leave a note it makes it a lot more obvious .
Tox report is pretty standard so they will find benzos in your system but they won't search your house as they won't have those results for a while and wouldn't bother .
Chances are higher that your parents will find that going through your things. If you don't want them to find it then make sure you dispose of it before you commit . Also , don't know but if you plan on doing it at home , try not let your parents find you. That shit is traumatising .
I found loads of empty vodka bottles and packs of pills the police didn't find but it all come up on the tox report