You can't really pinpoint how much a credit inquiry will affect your score but it is typically 2-4 points. Usually it's not something noticeable but if you've pulled it 30 times over the course of a year instead of 3-4, the impact may be more noticeable.
When explaining credit inquiries you want to explain whether or not they resulted in new debt. The reason for this is, if you obtained a new credit card, car...etc it could affect your debt to income ratio which would in turn affect how much you qualify for.
There are also ways to improve your credit before purchasing a home that a lender can help you with called a "Credit Simulator". Once you take the actions that the simulator tells you to do, we can immediately improve your score with our Rapid Rescore option.
If you have any questions about this or would like me to run one for you, please feel free to reach out. I am licensed in almost every state in the country. [email protected] or 619-379-8999.