Hi everybody, rather than start a new thread I thought I should bump this old one. 
Earlier this year I purchased this monitor.
	
	
		
			
				
			
			
				
				BenQ PD3420Q DesignVue Designer Monitor with 21:9 WQHD, excellent 98% P3 color space and VESA DisplayHDR 400 for video editing and also Mac users.
				
					
						
					
					www.amazon.co.uk
				
			 
		 
	 
At the time I was interested in the display pilot software as I thought it would be useful for me to split screen etc for some studies I am doing.  My Mac Mini 2012 was playing up once or twice it took ages to start and I figured as I would upgrade to m2 mac mini I would have this monitor.  To be honest I was a bit silly and shouldnt have purchased it but i have it now.  I figured I will run it 1080p with my existing Mac until I upgraded.
My Mac Mini 2012 has been fine for some time now so rather than upgrade I figured I would put a new hard drive in it and get a few more years.  It already has 16gb of ram.
Specs as follows:
Mac mini - (Late 2012)
Processor -2.3 GHz Quad-Core Intel Core i7
Graphics - Intel HD Graphics 4000 1536 MB
Currently running Catalina 10.15.7.  I only use it for office software, surfing, Pioneer Rekordbox and OBS to stream.
If I upgrade the HD is there a way I can get a better picture out of the screen for now.
Someone mentions above: You can get 2560×1440 at 60 Hz on your TV but 
only by using the Mac's Mini DisplayPort output, so you need an 
active DisplayPort-to-HDMI adapter because I'm fairly sure your TV only has HDMI inputs. 
Important: Do not get a simple "passive" DisplayPort-to-HDMI adapter or cable, because that will also limit you to 1920×1080.
Would this be of benefit to me?  How can I use the screen to its best abilty?  Any best suggestions for OS on new install?
Sorry if this is a silly question.
Thank you for all your help in advance.