HVAC and water system

Good evening sir

Sir iam self prudhvi (b.tech mechanical engineer)

Sir iam joined in pharma company two years ago
I learnt HVAC and water system physically sir , and solved troubleshooting

Could you please guide guidelines documents oriented
How to start , how to develop my self .

for further information read ISPE publication for HVAC and water and steam systems.
its have best information for engineers.