Version incompatibility node and npm? - node.js

Question

I using from this command "nvm install node" and then nvm use 11, but get me bellow error:
npm ERR! notsup Required: {"node":">=14.15.0 <15"}
npm ERR! notsup Actual: {"npm":"6.7.0","node":"11.15.0"}
But I need just to use nvm use 11, what can I do? (witch version of npm?)
My system is Mac.
My error is:
> npm install && npx cordova prepare && npx gulp
npm ERR! code ENOTSUP
npm ERR! notsup Unsupported engine for moodlemobile#3.9.6-dev: wanted: {"node":">=14.15.0 <15"} (current: {"node":"11.15.0","npm":"6.7.0"})
npm ERR! notsup Not compatible with your version of node/npm: moodlemobile#3.9.6-dev
npm ERR! notsup Not compatible with your version of node/npm: moodlemobile#3.9.6-dev
npm ERR! notsup Required: {"node":">=14.15.0 <15"}
npm ERR! notsup Actual: {"npm":"6.7.0","node":"11.15.0"}
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/asheq/.npm/_logs/2021-09-02T04_50_08_043Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! moodlemobile#3.9.6-dev setup: `npm install && npx cordova prepare && npx gulp`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the moodlemobile#3.9.6-dev setup script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/asheq/.npm/_logs/2021-09-02T04_50_08_060Z-debug.log