DIY flooring install

my husband and i are planning to install our wood flooring (oak tongue in groove) next weekend. we had plywood put down by contractors, and it’s all very flat, so we have a great surface to start on. are we crazy to try to do this ourselves? any advice so as to keep out the gaps or bubbles come spring time? the floor will be in our house for about 5 days before we install it. any advice in general?
thanks!

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