recommend a manga??

Does she like horror or thrillers?

this is really difficult since people have different tastes but maybe some shoujo, hopefully she knows to read from right to left but if she doesn't, start with a webtoon (I would recommend http://www.mangago.zone/read-manga/uglyhood/ but it's not very long) maybe start with the webtoon app or look through the shoujo/romance section

Read Shirokuma Cafe.

Yotsuba&! is pretty good place to start but it's licensed in English so I can't confirm the availability of it on sites like this.

give her some shoujo
or start her off on a manga that has an anime she likes (if she watches anime)
I personally like who made me a princess

also spy x family is a good one

http://www.mangago.zone/read-manga/the_good_teacher/

Sorry, that’s a yaoi

http://www.mangago.zone/read-manga/ojisama_to_neko/

This is what I meant

perhaps give her some oneshots?
message
rokuyoku [idk how to explain this one]
the yellow chair [guy finds a yellow chair friend in the rain]
akuma ni itsukushi no te o [demon and a pianist make an unlikely pair]
one flower [a girl and her mysterious friend (true story)]
forever honey [a dad and his tragic daughter]
anya kouro [a girl and her bookloving crush]

romance:
azure and claude [a guy with a strange job meets a girl who had the same circumstances]
5 centimetres per second [time heals all wounds]
voices of a distant star [girl in space and her bf correspond every few years b/c texts take a while to send in space]
living no matsunaga san [a girl moves into a shared house]
mobko no koi [super cute love]
tsubaki chou lonely planet [housekeeper x writer]
watashitachi na shiwase jikan [girl x death inmate]
mairimashita, senpai [really wholesome]
tada, kimi wo aishteru (aka heavenly forest) [cry cry cry]
otoyomegatari [historical goodness]
horimiya [laugh your ass off]

stuff thats music/industry/sports/educational related?:
runway de waratte [runway model and asipiring designer]
if you're gonna dress up do it like this [funny sibling chemistry]
ao no orchestra [prodigy picks up the violin once more]
kono oto tomare [chinese intrument (i think)]
arte [unlikely artist changing the social mindsets of her time]
gunjou ni siren [an old rival comes back]
complex age [ cosplayer surviving in the job market]

unique plots/isekai:
gokusai no ie [selling hair]
hiru [girl who secretly leeches off people]
inso's law [isekai]
yeon lok heun [cool stuff ahaha]
who made me a princess [you know this one]
a capable maid [coveted princess disguises herself and has supernatural ability]

slice of life:
my girl [a dude and his dead wife's child grow together]
no, you na [a badass girl takes care of some kids]

comedy:
yotsuba [lmao dude and his unruly mischievous adopted kid]
cool doji danshi [cute guys being clumsy]
horimiya [laugh your ass off]
gokushufudou the way of the house husband [yakuza becomes a badass top tier house husband]
yuukyuu no guusha asley [dude accidentally becomes imortal while baking a fucking cake]

enjoy ^^

She likes thrillers but not horror

Thank you very much I will check it out (づ￣ ³￣)づ

thank you <3

Thanks a lot ヾ(❀╹◡╹)ﾉ~

Thank you i actually love who made me a princess and spy x family

OMG you actually made a list for me, i am so grateful, i will check them out thank you very much hny ヾ(☆▽☆)