Welcome mate - what an interesting story - thank you.
I played SH5 for many months and then bought SH4 which I am happily playing at the moment. Played SH3 many years ago. Yeah SH5 needs a good rig - I also bought a new one to play SH5 as well but even SH4 on full graphics gives the card a workout.
All the best!
PS I am older than you by about 3 years.
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Aging: Eventually you will reach a point when you stop lying about your age and start bragging about it.

One way to look young is to always be seen with older people.

Some acquire wisdom as they grow older, others just grow older.