As an European , I will suggest them to use nostr:npub1sqzr42dj8vx32yd5jcvvl3ytux45kl0etgf6y2ymjvmd7lqmuwmqk9vk7vand/or nostr:npub1zv7d9l5ac0zdzeh5mzfyaegcdgcwn8m2uaxdpsj93hgp4nqjmd0s6k82ke

There is enough resources from these platforms to start and learn from.