Guidance on US pension plan and 401K for a Brazilian, nonresident alien

I am looking for guidance on US pension plans and 401Ks for a Brazilian, nonresident alien. I need the information to be specific and tailored to my situation, requiring one-on-one consultation. I need detailed information on the types of plans available, including tax implications for non-resident aliens, and strategies and investment options that could be suitable for me. I would like to have access to an experienced financial advisor with in-depth knowledge and experience in this field, who can provide me with the necessary information and support.