Change career - to study at L3

Hello everyone, I have just taken voluntary redundancy from working in lower management in HE for the last 23-years. I have experience of some recruitment, interviewing, JDs, performance management etc and I am also a school Governor where I have chaired complaints hearings etc. I have really enjoyed the HR aspects and have been thinking of doing my L3. However I’m 52 and wondering whether you all think I’m too old to re-train and start a entry level HR role. I’m not interested in climbing the ladder and would be happy with a HR Administration role or Assistant role. What are your thoughts? Too old? Honest opinions please, I’m happy with honest, construct opinions. Thank you! Sarah