The most obvious answer is using your mobile, where international calls come bundled into many plans.
I’ve a SIP number in the UK and one in the US; and just program a hardware phone with them, but this is very much not a non-techie solution.
https://toomanyadapters.com/with-skype-gone-whats-the-best-app-for-calling-overseas-numbers-now/ mentions “Viber Out” as a contender.
