Book daily iTalki sessions, but treat them as structured immersion blocks rather than just conversation. Combine those sessions with local Spanish-speaking meetups, media, and real-world tasks so your two weeks create a genuine Spanish environment. You do not need 20 hours of output; a mix of input and output will serve you better.
Schedule 60 to 90 minutes of speaking practice per day on a tutoring platform you already use. Book sessions in the morning when you are fresh, and ask tutors for homework or to act out real errands. Ten to twelve sessions is plenty; twenty hours in two weeks can cause fatigue and frustration, especially at early intermediate.
Fill the rest of the day with input at your level: podcasts, telenovelas, YouTube channels, audiobooks. Listen while driving, cooking, or doing chores. Set your phone and apps to Spanish. Write a short diary entry every evening without using a translator.
Use your local area. Arizona has a large Spanish-speaking population, so find community conversation groups at libraries, cultural centers, or coffee shops. Search for "Spanish conversation" on local event listings or social media; attend a Spanish-language church service, visit a panaderia, or volunteer somewhere Spanish is spoken. Ask organizers about the mix of learners and native speakers, and choose a group where you can speak, not just listen.
Make it a two-week experiment with your son. Cook from Spanish video recipes, watch movies with Spanish audio and Spanish subtitles, and narrate your day in simple Spanish. He can be your accountability partner by quizzing you or asking you to teach him five words a day.
Include output beyond tutoring. Voice-message yourself daily for 5 minutes summarizing what you did. Shadow 2 minutes of audio. Order food and buy groceries in Spanish whenever possible.
The main tradeoff is burnout. If you are used to one hour per week of conversation, jumping to two hours daily is not necessarily better. Keep output sessions short and supported by input. Also, local language exposure in Arizona is mostly Mexican Spanish, which is great, but if your study has been Spain-heavy, be ready for different vocabulary and accents. That is an advantage, not a problem.
Concrete plan: Week 1, days 1 to 3, do 45 minutes of tutor conversation and 90 minutes of listening. Days 4 to 7, add one local meetup or outing. Week 2, try a full Spanish Saturday where you speak Spanish from morning to night. At the end, assess what you can do now and set a normal weekly routine using the best habits.