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There is no reason to delay switching to Argon2id (unless you are using old devices that are significantly underpowered, or if your favorite browsers do not support WebAssembly).
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Your master password may or may not be sufficiently strong, depending on how it was created. If the two words were randomly selected from a diceware-type list (7776 words), and then supplemented with a random character string consisting of around 5 characters (mixed-case alphanumeric, plus special characters), then you should have sufficient entropy to protect your vault. However, if the words (and the added characters) were not selected with the help of a random number generator (or dice!), then your master password will not be sufficiently strong to withstand a brute-force attack.