[intakexhaust]

Have done a few. Its not difficult but the key is good planning and impeccable prep. Depending on the sub-floor, use a proper 'mastic' and follow the instructions / recommendation of which trowel to use. If the sub-floor has cracks, gaps, pre-fill them and let it cure before laying the floor. Durham's is a good application here.

Clean the entire sub-floor with care, swept and vac. Even such a small pebble will want to push through vinyl (though there are ways to deal with that after the floor has been lay). Obviously pull all the base trim as part of the prep.

No room is square and if you have many nooks and corners, I've found it easier to take the time and make a template using rosin paper. Tape it all together and match to the vinyl. Double check and test fit your template.

Some jobs that had a simple layout and room, could do without the template, leave excess edge and then press to cut against the wall. Goes pretty quick.

Get your mastik spread in sections at a time, set the vinyl and repeat. You don't want bubble nor wrinkle / fold marks. Also, this stuff easily tears - handle with some care.
One person job.

Light color tones don't take kindly to certain floor cleaners, even the manufacturers recommended type. Armstrong sucks in this regard. Causes premature yellowing and they fail to warranty.