Entrepreneurial Organisation

Hello All, As noted in the above title, I’m going to enquire about an entrepreneurial organisation. I have been looking into a role and the company are now looking to develop a HR department. The role I am looking into is varied and the recruiter has advised that it will include a few ad hoc tasks during the first few months. However, my concern is if the current employees will accept change? They all seem to follow the same entrepreneurial mindset as the CEO and the way of working is very agile. There do not seem to be any processes put into place in regards to recruitment etc. The company has been running for over thirty years and has great success, but it does seem very relaxed in its approaches to professionalism . I’m just concerned my experience isn’t enough to support a new HR function . Any previous knowledge/experience working in an agile company in a HR role would be appreciated Annie