If you don't want to learn JS but want to build something that feels like an SPA, you could try something like https://htmx.org https://htmx.org or https://unpo

If you don't want to learn JS but want to build something that feels like an SPA, you could try something like https://htmx.org https://htmx.org or https://unpoly.com https://unpoly.com. If learning JS is your goal, maybe Svelte as tamimio mentioned. I'm a fan of https://unpoly.com https://unpoly.com.