Upgrade 1x8 drivetrain I have an Orange 2017 Diamondback Hook that came with an SRAM 1x8 drive-train.

I'd like to upgrade it to increase the range. What are my best options?

Thanks!
As you have a 1x drivetrain with non-integrated brakes and shifters upgrading it to one with more gears is relatively simple. You need to replace the shifter, rear derailleur and cassette and chain at a minimum. You can also replace the crankset and bottom bracket.

As you have an 8 speed cassette the freehub body will take up to an 10 speed cassette with no problems. Some 11 speed cassettes will fit (but I would not put an 11 speed system on this bike).

You can take your pick of SRAM and Shimano 9 and 10 speed drivetrains and decide how much you want to spend, taking into account paying a bike shop to do the installation or buying necessary tools if you do it yourself. In the latter case you may have to do research to teach yourself how to do the installation properly also.

I would not spend money to upgrade more than a few steps above SRAM X3 on this entry level bike. You won't see the benefit as the frame, wheels and brakes are all still at the lower level.

Very often, especially with low end bikes, upgrades are not worth it, it's more cost effective to simply buy a better bike (and sell the old one). That way you get an upgrade of all the components in one go.