Need career advice in the agency world

I had a meeting last week with the CEO of the digital marketing agency I work at here in London. I currently work part time in the company in a hybrid role with Google Ads and SEO. I wanted to ask for the possibility to get hired fulltime. The answer though was pretty dissapointing, I was told my skills in the Google Ads department are still not at the level they want, they want me to be on a more strategic consultancy level (I have worked with Google Ads for around 1 year) and if I went fulltime, they dont have enough clients to fill out my calendar.

I feel a little but stuck, I want to improve my skills, but only working part time, surely improves my skills, but not at the same pace, as a full time gig could do. I have been thinking of searching for a full time position in other agencies in the London area.

I wanted to ask if you have any advice, I know there is a lot of very experienced people in here, who know the agency world in and out.

Any advice is much appreciated.