ive tried to install, but all i get are errors. ive tried to install with npm , but cannot run npm install as i get this error:

C:\jellywatch>npm install
node:internal/modules/cjs/loader:998
  throw err;
  ^

Error: Cannot find module 'C:\jellywatch\node_modules\npm\bin\npm-cli.js'
    at Module._resolveFilename (node:internal/modules/cjs/loader:995:15)
    at Module._load (node:internal/modules/cjs/loader:841:27)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:23:47 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}

Node.js v18.12.1
node:internal/modules/cjs/loader:998
  throw err;
  ^

Error: Cannot find module 'C:\jellywatch\node_modules\npm\bin\npm-cli.js'
←[90m    at Module._resolveFilename (node:internal/modules/cjs/loader:995:15)←[39m
←[90m    at Module._load (node:internal/modules/cjs/loader:841:27)←[39m
←[90m    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)←[39m
←[90m    at node:internal/main/run_main_module:23:47←[39m {
  code: ←[32m'MODULE_NOT_FOUND'←[39m,
  requireStack: []
}

Node.js v18.12.1

I've tried yarn as well ans i get these logs:

C:\jellywatch>yarn install
yarn install v1.22.19
$ :; (node ./preinstall.js > /dev/null 2>&1 || true)
warning package-lock.json found. Your project contains lock files generated by tools other than Yarn. It is advised not to mix package managers in order to avoid resolution inconsistencies caused by unsynchronized lock files. To clear this warning, remove package-lock.json.
[1/5] Validating package.json...
[2/5] Resolving packages...
success Already up-to-date.
Done in 0.19s.

C:\jellywatch>yarn run build
yarn run v1.22.19
error Command "build" not found.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

any help would be greatly appreciated!