Font suggestions for faster loading page

Hi! I have the Hello Boho theme. Google is flagging this warning: CLS issue: more than 0.25 (desktop). My tech guys have tried to resolve this by doing the following:
We’ve made a number of adjustments to your site’s CSS rules which should resolve at least some of the CLS issues. The rest is likely down to your custom fonts, so we installed the OMGF plugin, which will locally host your Google Fonts, improving the load time of those fonts, which will mitigate the CLS resulting from the change in font that results from the delay in the fonts loading.
They then also suggested the following: 
I can confirm the OMGF optimization has definitely had a beneficial impact on the site’s performance in general and with the CLS. However, it seems that the fonts that are being loaded in for the top header bar are having a negative impact on the site’s CLS Metric.With this in mind, it would be best to utilize a different font for this particular element via the font library of the theme.
My question is – In Hello Boho the cursive font in the top header is set as Summerfest. Can you suggest another font that is similar and has faster loading? 
Many thanks!