Auto reaction discord.py

Hello everyone, I’m trying to send a type of “help” emebd message via my discord.python bot.
I tried multiples method to react to the bot’s message. But it won’t work!
I got all the times this problem: NameError: name ‘react_message’ is not defined or “you are not giving much args” etc etc…

Here the piece of the code:

@client.command(pass_context=True)
async def test1(ctx, *args):

    embed = discord.Embed(
        title = 'Corsi Informatica I Anno',
        description = 'Nomi dei corsi',
        colour = discord.Colour.blue()
    )

    embed.set_footer(text = datetime.datetime.now().strftime('%d/%m/%Y %H:%M') )
    embed.set_author(name = ctx.message.author)
    embed.add_field(name = 'Calcolo I', value = 'I Semestre', inline = True)
    embed.add_field(name = 'Algebra Lineare', value='I Semestre', inline = True)
    embed.add_field(name ='Programmazione I', value='I Semestre', inline=True)
    embed.add_field(name='----------------------------------------------------------------------------', value = "**----------------------------------------------------------------------------**", inline=False)
    embed.add_field(name ='Elaboratori I', value='I Semestre', inline = True)
    embed.add_field(name ='Matematica Discreta', value='I Semestre', inline = True)
    embed.add_field(name ='Programmazione II', value='II Semestre', inline = True)
    embed.add_field(name='----------------------------------------------------------------------------', value = "**----------------------------------------------------------------------------**", inline=False)
    embed.add_field(name='Elaboratori II', value='II Semestre', inline = True)
    embed.add_field(name ='Calcolo II', value='II Semestre', inline = True)
    embed.add_field(name ='Inglese', value='II Semestre', inline = True)

    if not args:
        await ctx.message.channel.send("Non hai inserito un argomento per il comando")
        return;

    if len(args) > 1:
        await ctx.message.channel.send("Troppi argomenti specificati")
        return;

    if args[0] == "solido":
        reaction = "👍"
        sent = await ctx.message.channel.send(client.get_channel("795387716967333889"), embed=embed)
       # await message.add_reaction(sent, emoji = "\U0001F44D")
        await react_message.add_reaction(reaction)